JEE Main & Advanced Physics Current Electricity, Charging & Discharging Of Capacitors / वर्तमान बिजली, चार्ज और कैपेसिटर का निर Question Bank

done Grouping of Resistances Total Questions - 141

• question_answer1)
  The potential difference between points \[A\] and \[B\] of adjoining figure is                    [CPMT 1991]
  A)
                     \[\frac{2}{3}V\] done clear
  B)
                                                         \[\frac{8}{9}V\] done clear
  C)
                                                                                                                                                                                                 \[\frac{4}{3}V\]              done clear
  D)
                                                 \[2\,V\] done clear
  View Solution play_arrow

• question_answer2)
  Two resistors of resistance \[{{R}_{1}}\] and \[{{R}_{2}}\] having \[{{R}_{1}}>{{R}_{2}}\] are connected in parallel. For equivalent resistance \[R\], the correct statement is [CPMT 1978; KCET (Med.) 2000]
  A)
                     \[R>{{R}_{1}}+{{R}_{2}}\] done clear
  B)
                                       \[{{R}_{1}}<R<{{R}_{2}}\] done clear
  C)
                     \[{{R}_{2}}<R<({{R}_{1}}+{{R}_{2}})\]                     done clear
  D)
             \[R<{{R}_{1}}\] done clear
  View Solution play_arrow

• question_answer3)
  A wire of resistance R is divided in 10 equal parts. These parts are connected in parallel, the equivalent resistance of such connection will be                                        [CPMT 1973, 91]
  A)
                     0.01 R done clear
  B)
                     0.1 R done clear
  C)
                     10 R                                   done clear
  D)
             100 R done clear
  View Solution play_arrow

• question_answer4)
  The current in the adjoining circuit will be   [IIT 1983; CPMT 1991, 92; MH CET 2002; Pb. PMT 2001; Kerala PMT 2004]
  A)
                     \[\frac{1}{45}ampere\] done clear
  B)
                     \[\frac{1}{15}ampere\] done clear
  C)
                     \[\frac{1}{10}ampere\] done clear
  D)
                     \[\frac{1}{5}ampere\] done clear
  View Solution play_arrow

• question_answer5)
  There are 8 equal resistances R. Two are connected in parallel, such four groups are connected in series, the total resistance of the system will be                                                                                                                                [MP PMT 1987]
  A)
             R / 2 done clear
  B)
                                       2 R done clear
  C)
                     4 R                                     done clear
  D)
             8 R done clear
  View Solution play_arrow

• question_answer6)
  Three resistances of one ohm each are connected in parallel. Such connection is again connected with \[2/3\,\Omega \] resistor in series. The resultant resistance will be                                         [MP PMT 1985]
  A)
                     \[\frac{5}{3}\Omega \] done clear
  B)
                                       \[\frac{3}{2}\Omega \] done clear
  C)
                     \[1\,\Omega \]             done clear
  D)
  \[\frac{2}{3}\Omega \] done clear
  View Solution play_arrow

• question_answer7)
  The lowest resistance which can be obtained by connecting 10 resistors each of 1/10 ohm is  [MP PMT 1984; EAMCET 1994]
  A)
  \[1/250\,\Omega \]                       done clear
  B)
  \[1/200\,\Omega \] done clear
  C)
  \[1/100\,\Omega \]                       done clear
  D)
  \[1/10\,\Omega \] done clear
  View Solution play_arrow

• question_answer8)
  The reading of the ammeter as per figure shown is
  A)
                     \[\frac{1}{8}A\] done clear
  B)
                     \[\frac{3}{4}A\] done clear
  C)
                     \[\frac{1}{2}A\] done clear
  D)
                     2 A done clear
  View Solution play_arrow

• question_answer9)
  Three resistors each of 2 ohm are connected together in a triangular shape. The resistance between any two vertices will be [CPMT 1983; MP PET 1990; MP PMT 1993; DCE 2004]
  A)
                     4/3 ohm done clear
  B)
                                       3/4 ohm done clear
  C)
                     3 ohm                               done clear
  D)
             6 ohm done clear
  View Solution play_arrow

• question_answer10)
  There are \[n\] similar conductors each of resistance \[R\]. The resultant resistance comes out to be \[x\] when connected in parallel. If they are connected in series, the resistance comes out to be                                     [DPMT 2004]
  A)
                     \[x/{{n}^{2}}\] done clear
  B)
                                       \[{{n}^{2}}x\] done clear
  C)
                     \[x/n\]                             done clear
  D)
             \[nx\] done clear
  View Solution play_arrow

• question_answer11)
  Equivalent resistance between A and B will be [CPMT 1981]
  A)
             2 ohm done clear
  B)
                     18 ohm done clear
  C)
                     6 ohm done clear
  D)
                     3.6 ohm done clear
  View Solution play_arrow

• question_answer12)
  A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is
  A)
                     9 ohms done clear
  B)
                                       12 ohms done clear
  C)
                     6 ohms                             done clear
  D)
             8/3 ohms done clear
  View Solution play_arrow

• question_answer13)
  The effective resistance between the points \[A\] and \[B\] in the figure is                                         [MP PET 1994]
  A)
                     \[5\,\Omega \] done clear
  B)
                     \[2\,\Omega \] done clear
  C)
                     \[3\,\Omega \] done clear
  D)
                     \[4\,\Omega \] done clear
  View Solution play_arrow

• question_answer14)
  Three resistances of magnitude 2, 3 and 5 ohm are connected in parallel to a battery of 10 volts and of negligible resistance. The potential difference across \[3\,\Omega \] resistance will be                                       [CPMT 1972]
  A)
             2 volts done clear
  B)
                                       3 volts done clear
  C)
                     5 volts                              done clear
  D)
             10 volts done clear
  View Solution play_arrow

• question_answer15)
  A current of 2 A flows in a system of conductors as shown. The potential difference \[({{V}_{A}}-{{V}_{B}})\] will be                   [CPMT 1975, 76]
  A)
                     \[+2\,V\] done clear
  B)
                     \[+1\,V\] done clear
  C)
                     \[-1\,V\] done clear
  D)
                     \[-2\,V\] done clear
  View Solution play_arrow

• question_answer16)
  Referring to the figure below, the effective resistance of the network is                                               [NCERT 1973, 75]
  A)
             2\[r\] done clear
  B)
                     4\[r\] done clear
  C)
                     10\[r\] done clear
  D)
                     \[5r/2\] done clear
  View Solution play_arrow

• question_answer17)
  Two resistances are joined in parallel whose resultant is \[\frac{6}{8}\]ohm. One of the resistance wire is broken and the effective resistance becomes \[2\,\Omega \]. Then the resistance in ohm of the wire that got broken was                                                                          [CPMT 1976; DPMT 1982]
  A)
                     3/5 done clear
  B)
                                       2 done clear
  C)
                     6/5                                     done clear
  D)
             3 done clear
  View Solution play_arrow

• question_answer18)
  Given three equal resistors, how many different combination of all the three resistors can be made       [NCERT 1970]
  A)
                     Six done clear
  B)
                                       Five done clear
  C)
                     Four                                  done clear
  D)
             Three done clear
  View Solution play_arrow

• question_answer19)
  Lamps used for household lighting are connected in
  A)
                     Series done clear
  B)
                                       Parallel done clear
  C)
                     Mixed circuit                 done clear
  D)
             None of the above done clear
  View Solution play_arrow

• question_answer20)
  The equivalent resistance of resistors connected in series is always         [CPMT 1984; MP PMT 1999]
  A)
                     Equal to the mean of component resistors done clear
  B)
                     Less than the lowest of component resistors done clear
  C)
                     In between the lowest and the highest of component resistors done clear
  D)
                     Equal to sum of component resistors done clear
  View Solution play_arrow

• question_answer21)
  A cell of negligible resistance and e.m.f. 2 volts is connected to series combination of 2, 3 and 5 ohm. The potential difference in volts between the terminals of 3 ohm resistance will be                                     [CPMT 1976]
  A)
                     0.6 done clear
  B)
                                       2/3 done clear
  C)
                     3                                         done clear
  D)
             6 done clear
  View Solution play_arrow

• question_answer22)
  Four wires of equal length and of resistances 10 ohms each are connected in the form of a square. The equivalent resistance between two opposite corners of the square is [NCERT 1977]
  A)
                     10 \[ohm\] done clear
  B)
                                       40\[ohm\] done clear
  C)
                     20\[ohm\]                      done clear
  D)
             10/4\[ohm\] done clear
  View Solution play_arrow

• question_answer23)
  Two resistors are connected  in series  in parallel. The equivalent resistance in the two cases are 9\[ohm\] and 2\[ohm\] respectively. Then the resistances of the component resistors are                                                           [CPMT 1984]
  A)
                     2\[ohm\] and 7\[ohm\]   done clear
  B)
             3\[ohm\] and 6\[ohm\] done clear
  C)
                     3\[ohm\] and 9\[ohm\]   done clear
  D)
             5\[ohm\] and 4\[ohm\] done clear
  View Solution play_arrow

• question_answer24)
  Resistors of 1, 2, 3 ohm are connected in the form of a triangle. If a 1.5 volt cell of negligible internal resistance is connected across 3 ohm resistor, the current flowing through this resistance will be                                        [CPMT 1984]
  A)
                     0.25 amp                         done clear
  B)
             0.5 amp done clear
  C)
                     1.0 amp                           done clear
  D)
             1.5 amp done clear
  View Solution play_arrow

• question_answer25)
  Resistances of 6 ohm each are connected in the manner shown in adjoining figure. With the current 0.5 ampere as shown in figure, the potential difference \[{{V}_{P}}-{{V}_{Q}}\] is [CPMT 1989]
  A)
                     3.6 V done clear
  B)
                                       6.0 V done clear
  C)
                     3.0 V done clear
  D)
             7.2 V done clear
  View Solution play_arrow

• question_answer26)
  The equivalent resistance of the arrangement of resistances shown in adjoining figure between the points A and B is                                                               [CPMT 1990; BVP 2003]
  A)
                                                       6 ohm done clear
  B)
                     8 ohm done clear
  C)
                     16 ohm done clear
  D)
                     24 ohm done clear
  View Solution play_arrow

• question_answer27)
  In the network of resistors shown in the adjoining figure, the equivalent resistance between A and B is
  A)
                     54 ohm done clear
  B)
             18 ohm done clear
  C)
                     36 ohm done clear
  D)
                     9 ohm done clear
  View Solution play_arrow

• question_answer28)
  A wire is broken in four equal parts. A packet is formed by keeping the four wires together. The resistance of the packet in comparison to the resistance of the wire will be [MP PET 1985; AFMC 2005]
  A)
                     Equal done clear
  B)
                                       One fourth done clear
  C)
                     One eight                       done clear
  D)
             \[\frac{1}{16}th\] done clear
  View Solution play_arrow

• question_answer29)
  Four resistances are connected in a circuit in the given figure. The electric current flowing through 4 ohm and 6 ohm resistance is respectively                                        [MP PET 1993]
  A)
                      2 amp and 4 amp done clear
  B)
                     1 amp and 2 amp done clear
  C)
                     1 amp and 1 amp done clear
  D)
                     2 amp and 2 amp done clear
  View Solution play_arrow

• question_answer30)
  An infinite sequence of resistance is shown in the figure. The resultant resistance between A and B will be, when \[{{R}_{1}}=1\,ohm\] and \[{{R}_{2}}=2\,ohm\]                                 [MP PET 1993]
  A)
             Infinity                                     done clear
  B)
             \[1\,\Omega \] done clear
  C)
                     \[2\,\Omega \]             done clear
  D)
             \[1.5\,\Omega \] done clear
  View Solution play_arrow

• question_answer31)
  In the figure, the value of resistors to be connected between C and D so that the resistance of the entire circuit between A and B does not change with the number of elementary sets used is
  A)
                     R done clear
  B)
                                       \[R(\sqrt{3}-1)\] done clear
  C)
                     3 R                                     done clear
  D)
             \[R(\sqrt{3}+1)\] done clear
  View Solution play_arrow

• question_answer32)
  In the figure shown, the total resistance between A and B is
  A)
             \[12\,\Omega \] done clear
  B)
                                       \[4\,\Omega \] done clear
  C)
                     \[6\,\Omega \] done clear
  D)
                                       \[8\,\Omega \] done clear
  View Solution play_arrow

• question_answer33)
  The current from the battery in circuit diagram shown is                                                                       [IIT 1989]
  A)
                     1 A done clear
  B)
                     2 A done clear
  C)
                     1.5 A done clear
  D)
                     3 A done clear
  View Solution play_arrow

• question_answer34)
  In the given figure, when key K is opened, the reading of the ammeter A will be
  A)
             50 A done clear
  B)
                     2 A done clear
  C)
                     0.5 A done clear
  D)
                     \[\frac{10}{9}A\] done clear
  View Solution play_arrow

• question_answer35)
  In the given circuit, the potential of the point E is                                                                                          [MP PMT 2003]
  A)
                                                       Zero done clear
  B)
                     \[-\,8\,V\] done clear
  C)
                     \[-\,4/3\,V\] done clear
  D)
                     4/3 V done clear
  View Solution play_arrow

• question_answer36)
  If a resistance \[{{R}_{2}}\] is connected in parallel with the resistance R in the circuit shown, then possible value of current through R and the possible value of \[{{R}_{2}}\] will be
  A)
             \[\frac{I}{3},\,R\] done clear
  B)
                     \[I,\,2R\] done clear
  C)
                     \[\frac{I}{3},\,2R\] done clear
  D)
                     \[\frac{I}{2},\,R\] done clear
  View Solution play_arrow

• question_answer37)
  Four wires AB, BC, CD, DA of resistance 4 ohm each and a fifth wire BD of resistance 8 ohm are joined to form a rectangle ABCD of which BD is a diagonal. The effective resistance between the points A and B is              [MP PMT 1994]
  A)
             24 ohm done clear
  B)
                                       16 ohm done clear
  C)
                     \[\frac{4}{3}ohm\]      done clear
  D)
             \[\frac{8}{3}ohm\] done clear
  View Solution play_arrow

• question_answer38)
  A battery of e.m.f. 10 V is connected to resistance as shown in figure. The potential difference \[{{V}_{A}}-{{V}_{B}}\] between the points A and B is                            [MP PMT 1994]
  A)
                     \[-2V\] done clear
  B)
                     \[2V\] done clear
  C)
                     \[5V\] done clear
  D)
                     \[\frac{20}{11}V\] done clear
  View Solution play_arrow

• question_answer39)
  Three resistances, each of 1 ohm, are joined in parallel. Three such combinations are put in series, then the resultant resistance will be                                                      [MP PMT 1994]
  A)
                     9 ohm done clear
  B)
                                       3 ohm done clear
  C)
                     1 ohm                               done clear
  D)
             \[\frac{1}{3}ohm\] done clear
  View Solution play_arrow

• question_answer40)
  A student has 10 resistors of resistance ?r?. The minimum resistance made by him from given resistors is                                                                                              [AFMC 1995]
  A)
                     10 r done clear
  B)
                                       \[\frac{r}{10}\] done clear
  C)
                     \[\frac{r}{100}\]           done clear
  D)
             \[\frac{r}{5}\] done clear
  View Solution play_arrow

• question_answer41)
  Two wires of same metal have the same length but their cross-sections are in the ratio \[3:1\]. They are joined in series. The resistance of the thicker wire is \[10\,\Omega \]. The total resistance of the combination will be        [CBSE PMT 1995]
  A)
                     \[40\,\Omega \] done clear
  B)
                                       \[\frac{40}{3}\Omega \] done clear
  C)
                     \[\frac{5}{2}\Omega \]     done clear
  D)
             \[100\,\Omega \] done clear
  View Solution play_arrow

• question_answer42)
  The equivalent resistance of the following infinite network of resistances is                                        [AIIMS 1995]
  A)
                     Less than \[4\,\Omega \] done clear
  B)
                     \[4\,\Omega \] done clear
  C)
                     More than \[4\,\Omega \] but less than \[12\,\Omega \] done clear
  D)
                     \[12\,\Omega \] done clear
  View Solution play_arrow

• question_answer43)
  In the figure given below, the current passing through \[6\,\Omega \] resistor is                                               [Manipal MEE 1995]
  A)
                     0.40 ampere done clear
  B)
                     0.48 ampere done clear
  C)
                     0.72 ampere done clear
  D)
                     0.80 ampere done clear
  View Solution play_arrow

• question_answer44)
  Three equal resistances each of value R are joined as shown in the figure. The equivalent resistance between M and N is [MP PET 1995]
  A)
                                                       R done clear
  B)
                     2R done clear
  C)
                     \[\frac{R}{2}\] done clear
  D)
                     \[\frac{R}{3}\] done clear
  View Solution play_arrow

• question_answer45)
  The equivalent resistance between points A and B of an infinite network of resistances each of \[1\,\Omega \] connected as shown, is                                     [Haryana CEE 1996]
  A)
                                                       Infinite done clear
  B)
                                       \[2\,\Omega \] done clear
  C)
                     \[\frac{1+\sqrt{5}}{2}\Omega \] done clear
  D)
             Zero done clear
  View Solution play_arrow

• question_answer46)
  A copper wire of resistance R is cut into ten parts of equal length. Two pieces each are joined in series and then five such combinations are joined in parallel. The new combination will have a resistance                      [MP PET 1996]
  A)
                     R done clear
  B)
                                       \[\frac{R}{4}\] done clear
  C)
                     \[\frac{R}{5}\]               done clear
  D)
             \[\frac{R}{25}\] done clear
  View Solution play_arrow

• question_answer47)
  A wire has resistance \[12\,\Omega \]. It is bent in the form of a circle. The effective resistance between the two points on any diameter is equal to                                                           [JIPMER 1999]
  A)
                     \[12\,\Omega \] done clear
  B)
                                       \[6\,\Omega \] done clear
  C)
                     \[3\,\Omega \]             done clear
  D)
             \[24\,\Omega \] done clear
  View Solution play_arrow

• question_answer48)
  In the circuit shown, the point ?B? is earthed. The potential at the point ?A? is
  A)
                     14 V done clear
  B)
                     24 V done clear
  C)
                     26 V done clear
  D)
                     50 V done clear
  View Solution play_arrow

• question_answer49)
  Three resistors each of \[4\,\Omega \] are connected together to form a network. The equivalent resistance of the network cannot be
  A)
                     \[1.33\,\Omega \] done clear
  B)
                                       \[3.0\,\Omega \] done clear
  C)
                     \[6.0\,\Omega \] done clear
  D)
                                       \[12.0\,\Omega \] done clear
  View Solution play_arrow

• question_answer50)
  In the circuit shown below, the cell has an e.m.f. of 10 V and internal resistance of 1 ohm. The other resistances are shown in the figure. The potential difference \[{{V}_{A}}-{{V}_{B}}\] is [MP PMT 1997]
  A)
                     6 V done clear
  B)
                     4 V done clear
  C)
                     2 V done clear
  D)
                     \[-2\,V\] done clear
  View Solution play_arrow

• question_answer51)
  A wire of resistance R is cut into ?n? equal parts. These parts are then connected in parallel. The equivalent  resistance of the combination will be            [MP PMT/PET 1998; BHU 2005]
  A)
                     nR done clear
  B)
                                       \[\frac{R}{n}\] done clear
  C)
                     \[\frac{n}{R}\]              done clear
  D)
             \[\frac{R}{{{n}^{2}}}\] done clear
  View Solution play_arrow

• question_answer52)
  The resistance between the terminal points A and B of the given infinitely long circuit will be                      [MP PMT/PET 1998]
  A)
                     \[(\sqrt{3}-1)\] done clear
  B)
                                       \[(1-\sqrt{3})\] done clear
  C)
                     \[(1+\sqrt{3})\] done clear
  D)
             \[(2+\sqrt{3})\] done clear
  View Solution play_arrow

• question_answer53)
  The current in the given circuit is                      [CBSE PMT 1999]
  A)
                     8.31 A done clear
  B)
                     6.82 A done clear
  C)
                     4.92 A done clear
  D)
                     2 A done clear
  View Solution play_arrow

• question_answer54)
  What is the current (i) in the circuit as shown in figure [AIIMS 1998]
  A)
                                                       2 A done clear
  B)
                     1.2 A done clear
  C)
                     1 A done clear
  D)
                     0.5 A done clear
  View Solution play_arrow

• question_answer55)
  n equal resistors are first connected in series and then connected in parallel. What is the ratio of the maximum to the minimum resistance                                                      [KCET 1994]
  A)
                     n                                         done clear
  B)
             \[\frac{1}{{{n}^{2}}}\] done clear
  C)
                     \[{{n}^{2}}\] done clear
  D)
             \[\frac{1}{n}\] done clear
  View Solution play_arrow

• question_answer56)
  A uniform wire of \[16\,\Omega \] is made into the form of a square. Two opposite corners of the square are connected by a wire of resistance \[16\,\Omega \]. The effective resistance between the other two opposite corners is                                                                   [EAMCET (Med.) 1995]
  A)
                     \[32\,\Omega \] done clear
  B)
                                       \[20\,\Omega \] done clear
  C)
                     \[8\,\Omega \]             done clear
  D)
             \[4\,\Omega \] done clear
  View Solution play_arrow

• question_answer57)
  For what value of R the net resistance of the circuit will be 18 ohms                                         [RPET 1997]
  A)
                     \[8\,\Omega \] done clear
  B)
                     \[10\,\Omega \] done clear
  C)
                     \[16\,\Omega \] done clear
  D)
                     \[24\,\Omega \] done clear
  View Solution play_arrow

• question_answer58)
  In the figure, current through the \[3\,\Omega \] resistor is 0.8 ampere, then potential drop through \[4\,\Omega \] resistor is                                           [CBSE PMT 1993; AFMC 1999; MP PMT 2004]
  A)
                     9.6 V done clear
  B)
                     2.6 V done clear
  C)
                     4.8 V done clear
  D)
                     1.2 V done clear
  View Solution play_arrow

• question_answer59)
  Three resistances \[4\,\Omega \] each of are connected in the form of an equilateral triangle. The effective resistance between two corners is                                       [CBSE PMT 1993]
  A)
                     \[8\,\Omega \] done clear
  B)
                                       \[12\,\Omega \] done clear
  C)
                     \[\frac{3}{8}\Omega \]     done clear
  D)
             \[\frac{8}{3}\Omega \] done clear
  View Solution play_arrow

• question_answer60)
  What will be the equivalent resistance between the two points A and D                                                [CBSE PMT 1996]
  A)
             \[10\,\Omega \] done clear
  B)
                                       \[20\,\Omega \] done clear
  C)
                     \[30\,\Omega \] done clear
  D)
             \[40\,\Omega \] done clear
  View Solution play_arrow

• question_answer61)
  What is the equivalent resistance between A and B in the figure below if \[R=3\,\Omega \]                                         [SCRA 1996]
  A)
                     \[9\,\Omega \] done clear
  B)
                     \[12\,\Omega \] done clear
  C)
                     \[15\,\Omega \] done clear
  D)
                     None of these done clear
  View Solution play_arrow

• question_answer62)
  What is the equivalent resistance between A and B [BHU 1997; MP PET 2001]
  A)
                                                       \[\frac{2}{3}R\] done clear
  B)
                     \[\frac{3}{2}R\] done clear
  C)
                     \[\frac{R}{2}\] done clear
  D)
                     \[2R\] done clear
  View Solution play_arrow

• question_answer63)
  The current in the following circuit is              [CBSE PMT 1997]
  A)
             \[\frac{1}{8}A\] done clear
  B)
                     \[\frac{2}{9}A\] done clear
  C)
                     \[\frac{2}{3}A\] done clear
  D)
                     \[1A\] done clear
  View Solution play_arrow

• question_answer64)
  What is the equivalent resistance of the circuit [KCET 1998]
  A)
                     \[6\,\Omega \] done clear
  B)
                     \[7\,\Omega \] done clear
  C)
                     \[8\,\Omega \] done clear
  D)
                     \[9\,\Omega \] done clear
  View Solution play_arrow

• question_answer65)
  10 wires (same length, same area, same material) are connected in parallel and each has 1W resistance, then the equivalent resistance will be                                    [RPMT 1999]
  A)
          10 W done clear
  B)
                         1 W done clear
  C)
          0.1 W                                done clear
  D)
          0.001 W done clear
  View Solution play_arrow

• question_answer66)
  The equivalent resistance of the circuit shown in the figure is                                                                                              [CPMT 1999]
  A)
          8 W done clear
  B)
          6 W done clear
  C)
          5 W done clear
  D)
          4 W done clear
  View Solution play_arrow

• question_answer67)
  In the given figure, the equivalent resistance between the points A and B is                                        [AIIMS 1999]
  A)
          8 W done clear
  B)
          6 W done clear
  C)
          4 W done clear
  D)
          2 W done clear
  View Solution play_arrow

• question_answer68)
  An infinite ladder network is arranged with resistances R and 2 R as shown.  The effective resistance between terminals A and B is                                                                [AMU (Med.) 1999]
  A)
          ¥                                        done clear
  B)
          R done clear
  C)
          2 R                                     done clear
  D)
          3 R done clear
  View Solution play_arrow

• question_answer69)
  If all the resistors shown have the value 2 ohm each, the equivalent resistance over AB is                             [JIPMER 1999]
  A)
          2 ohm done clear
  B)
          4 ohm done clear
  C)
          \[1\frac{2}{3}\,\,ohm\] done clear
  D)
          \[2\frac{2}{3}\,\,ohm\] done clear
  View Solution play_arrow

• question_answer70)
  A battery of emf 10 V and internal resistance \[3\,\Omega \] is connected to a resistor as shown in the figure.  If the current in the circuit is 0.5 A.  then the resistance of the resistor will be                  [MH CET 2000; Pb. PMT 2000]
  A)
          19 W done clear
  B)
          17 W done clear
  C)
          10 W done clear
  D)
          12 W done clear
  View Solution play_arrow

• question_answer71)
  The potential drop across the 3W resistor is      [CPMT 2000]
  A)
          1 V done clear
  B)
          1.5 V done clear
  C)
          2 V done clear
  D)
          3 V done clear
  View Solution play_arrow

• question_answer72)
  In the given figure, potential difference between A and B is [RPMT 2000]
  A)
          0 done clear
  B)
          5 volt done clear
  C)
          10 volt done clear
  D)
          15 volt done clear
  View Solution play_arrow

• question_answer73)
  If each resistance in the figure is of 9 W then reading of ammeter is                                         [RPMT 2000]
  A)
          5 A                                     done clear
  B)
          8 A done clear
  C)
          2 A                                     done clear
  D)
          9 A done clear
  View Solution play_arrow

• question_answer74)
  Four resistances 10 W, 5 W, 7 W and 3 W are connected so that they form the sides of a rectangle AB, BC, CD and DA respectively.  Another resistance of 10 W is connected across the diagonal AC. The equivalent resistance between A and B is                                                               [EAMCET (Med.) 2000]
  A)
          2 W                                    done clear
  B)
          5 W done clear
  C)
          7 W                                    done clear
  D)
          10 W done clear
  View Solution play_arrow

• question_answer75)
  Two wires of equal diameters, of resistivities \[{{\rho }_{1}}\]and \[{{\rho }_{2}}\] and lengths l1 and l2, respectively, are joined in series.  The equivalent resistivity of the combination is                                                                                [EAMCET (Engg.) 2000]
  A)
          \[\frac{{{\rho }_{1}}{{l}_{1}}+{{\rho }_{2}}{{l}_{2}}}{{{l}_{1}}+{{l}_{2}}}\] done clear
  B)
          \[\frac{{{\rho }_{1}}{{l}_{2}}+{{\rho }_{2}}{{l}_{1}}}{{{l}_{1}}-{{l}_{2}}}\] done clear
  C)
          \[\frac{{{\rho }_{1}}{{l}_{2}}+{{\rho }_{2}}{{l}_{1}}}{{{l}_{1}}+{{l}_{2}}}\] done clear
  D)
                         \[\frac{{{\rho }_{1}}{{l}_{1}}-{{\rho }_{2}}{{l}_{2}}}{{{l}_{1}}-{{l}_{2}}}\] done clear
  View Solution play_arrow

• question_answer76)
  Four resistances of 100 W each are connected in the form of square. Then, the effective resistance along the diagonal points is                                                     [MH CET 2000]
  A)
          200 W                               done clear
  B)
          400 W done clear
  C)
          100 W                               done clear
  D)
          150 W done clear
  View Solution play_arrow

• question_answer77)
  Equivalent resistance between the points A and B is (in W) [AMU (Engg.) 2000]
  A)
          \[\frac{1}{5}\]               done clear
  B)
          \[1\frac{1}{4}\] done clear
  C)
          \[2\frac{1}{3}\]             done clear
  D)
          \[3\frac{1}{2}\] done clear
  View Solution play_arrow

• question_answer78)
  Two wires of the same material and equal length are joined in parallel combination.  If one of them has half the thickness of the other and the thinner wire has a resistance of 8 ohms, the resistance of the combination is equal to [AMU (Engg.) 2000]
  A)
          \[\frac{5}{8}\,\,ohms\] done clear
  B)
                     \[\frac{8}{5}\,\,ohms\] done clear
  C)
          \[\frac{3}{8}\,\,ohms\] done clear
  D)
                         \[\frac{8}{3}\,\,ohms\] done clear
  View Solution play_arrow

• question_answer79)
  In the circuit shown here, what is the value of the unknown resistor R so that the total resistance of the circuit between points P and Q is also equal to R                           [MP PET 2001]
  A)
          3 ohms done clear
  B)
          \[\sqrt{39}\,ohms\] done clear
  C)
          \[\sqrt{69}\,ohms\] done clear
  D)
          10 ohms done clear
  View Solution play_arrow

• question_answer80)
  A uniform wire of resistance 9 W is cut into 3 equal parts.  They are connected in the form of equilateral triangle ABC.  A cell of e.m.f. 2 V and negligible internal resistance is connected across B and C.  Potential difference across AB is [Kerala (Engg.) 2001]
  A)
          1 V done clear
  B)
                         2 V done clear
  C)
          3 V                                     done clear
  D)
          0.5 V done clear
  View Solution play_arrow

• question_answer81)
  The resistors of resistances 2 W, 4 W and 8 W are connected in parallel, then the equivalent resistance of the combination will be                                                        [KCET 2001]
  A)
          \[\frac{8}{7}\Omega \]     done clear
  B)
          \[\frac{7}{8}\Omega \] done clear
  C)
          \[\frac{7}{4}\Omega \]     done clear
  D)
          \[\frac{4}{9}\Omega \] done clear
  View Solution play_arrow

• question_answer82)
  Effective resistance between A and B is           [UPSEAT 2001]
  A)
          15 W done clear
  B)
          5 W done clear
  C)
          \[\frac{5}{2}\Omega \] done clear
  D)
          20 W done clear
  View Solution play_arrow

• question_answer83)
  The effective resistance of two resistors in parallel is \[\frac{12}{7}\,\,\Omega \].  If one of the resistors is disconnected the resistance becomes 4 W.  The resistance of the other resistor is         [MH CET 2002]
  A)
          4 W                                    done clear
  B)
          3 W done clear
  C)
          \[\frac{12}{7}\,\,\Omega \]                                        done clear
  D)
          \[\frac{7}{12}\Omega \] done clear
  View Solution play_arrow

• question_answer84)
  Two resistance wires on joining in parallel the resultant resistance is \[\frac{6}{5}\,\,ohms\].  One of the wire breaks, the effective resistance is 2 ohms.  The resistance of the broken wire is [MP PET 2001, 2002]
  A)
          \[\frac{3}{5}\,\,ohm\] done clear
  B)
                         2 ohm done clear
  C)
          \[\frac{6}{5}\,\,ohm\]       done clear
  D)
          3 ohm done clear
  View Solution play_arrow

• question_answer85)
  In the circuit, the potential difference across PQ will be nearest to                                           [Kerala PET 2002]
  A)
          9.6 V done clear
  B)
          6.6 V done clear
  C)
          4.8 V done clear
  D)
          3.2 V done clear
  View Solution play_arrow

• question_answer86)
  Three resistors are connected to form the sides of a triangle ABC, the resistance of the sides AB, BC and CA are 40 ohms, 60 ohms and 100 ohms respectively. The effective resistance between the points A and B in ohms will be [JIPMER 2002]
  A)
          32                                       done clear
  B)
          64 done clear
  C)
          50                                       done clear
  D)
          200 done clear
  View Solution play_arrow

• question_answer87)
  Find the equivalent resistance across AB      [Orissa JEE 2002]
  A)
          1 W done clear
  B)
          2 W done clear
  C)
          3 W done clear
  D)
          4 W done clear
  View Solution play_arrow

• question_answer88)
  The equivalent resistance between x and y in the circuit shown is                                             [MP PMT 2002]
  A)
          10 W done clear
  B)
          40 W done clear
  C)
          20 W done clear
  D)
          \[\frac{5}{2}\,\,\Omega \] done clear
  View Solution play_arrow

• question_answer89)
  . The equivalent resistance between the points P and Q of the circuit given is                                        [Pb. PMT 2002]
  A)
          \[\frac{R}{4}\] done clear
  B)
          \[\frac{R}{3}\] done clear
  C)
          4 R done clear
  D)
          2 R done clear
  View Solution play_arrow

• question_answer90)
  Two wires of the same dimensions but resistivities \[{{\rho }_{1}}\text{ and }{{\rho }_{2}}\] are connected in series.  The equivalent resistivity of the combination is                                  [KCET 2003]
  A)
          \[{{\rho }_{1}}+{{\rho }_{2}}\]                                   done clear
  B)
          \[\frac{{{\rho }_{1}}+{{\rho }_{2}}}{2}\] done clear
  C)
          \[\sqrt{{{\rho }_{1}}{{\rho }_{2}}}\]                        done clear
  D)
          \[2({{\rho }_{1}}+{{\rho }_{2}})\] done clear
  View Solution play_arrow

• question_answer91)
  Three unequal resistors in parallel are equivalent to a resistance 1 ohm.  If two of them are in the ratio 1 : 2 and if no resistance value is fractional, the largest of the three resistances in ohms is                                         [EAMCET 2003]
  A)
          4                                         done clear
  B)
          6 done clear
  C)
          8                                         done clear
  D)
          12 done clear
  View Solution play_arrow

• question_answer92)
  A 3volt battery with negligible internal resistance is connected in a circuit as shown in the figure.  The current I, in the circuit will be                                                                    [AIEEE 2003]
  A)
          1/3 A done clear
  B)
          1 A done clear
  C)
          1.5 A done clear
  D)
          2 A done clear
  View Solution play_arrow

• question_answer93)
  Find the equivalent resistance between the points a and b                                                                             [BHU 2003; CPMT 2004]
  A)
          2 W done clear
  B)
          4 W done clear
  C)
          8 W done clear
  D)
          16 W done clear
  View Solution play_arrow

• question_answer94)
  The potential difference between point A & B is [BHU 2003; CPMT 2004; MP PMT 2005]
  A)
                                                       \[\frac{20}{7}\,\,V\] done clear
  B)
                     \[\frac{40}{7}\,\,V\] done clear
  C)
          \[\frac{10}{7}\,\,V\] done clear
  D)
          0 done clear
  View Solution play_arrow

• question_answer95)
  In the circuit shown below,   The reading of the voltmeter V is                                                    [MP PET 2003]
  A)
          12 V done clear
  B)
          8 V done clear
  C)
          20 V done clear
  D)
          16 V done clear
  View Solution play_arrow

• question_answer96)
  A wire has a resistance of 12 ohm. It is bent in the form of equilateral triangle. The effective resistance between any two corners of the triangle is
  A)
                     9 ohms done clear
  B)
                                       12 ohms done clear
  C)
                     6 ohms                             done clear
  D)
             8/3 ohms done clear
  View Solution play_arrow

• question_answer97)
  A series combination of two resistors 1 W each is connected to a 12 V battery of internal resistance 0.4 W.  The current flowing through it will be                             [MH CET (Med.) 1999]
  A)
          3.5 A done clear
  B)
                         5 A done clear
  C)
          6 A                                     done clear
  D)
          10 A done clear
  View Solution play_arrow

• question_answer98)
  In the circuit shown in the adjoining figure, the current between B and D is zero, the unknown resistance is of [CPMT 1986]
  A)
                                                       \[4\,\Omega \] done clear
  B)
                     \[2\,\Omega \] done clear
  C)
                     \[3\,\Omega \] done clear
  D)
                     e.m.f. of a cell is required to find the value of X done clear
  View Solution play_arrow

• question_answer99)
  In the circuit shown in the figure, the current flowing in \[2\,\Omega \]  resistance                          [CPMT 1989; MP PMT 2004]
  A)
                     1.4 A done clear
  B)
                     1.2 A done clear
  C)
                     0.4 A done clear
  D)
                     1.0 A done clear
  View Solution play_arrow

• question_answer100)
  Five resistors are connected as shown in the diagram. The equivalent resistance between \[A\] and \[B\] is
  A)
                     \[6\,ohm\] done clear
  B)
                     \[9\,ohm\] done clear
  C)
                     \[12\,ohm\] done clear
  D)
                     \[15\,ohm\] done clear
  View Solution play_arrow

• question_answer101)
  In the figure given the value of \[X\] resistance will be, when the p.d. between B and D is zero                  [MP PET 1993]
  A)
                     4 ohm done clear
  B)
             6 ohm done clear
  C)
                     8 ohm                               done clear
  D)
             9 ohm done clear
  View Solution play_arrow

• question_answer102)
  The effective resistance between points A and B is                                                                     [NCERT 1974; MP PMT 2000]
  A)
          \[10\,\Omega \] done clear
  B)
          \[20\,\Omega \] done clear
  C)
          \[40\,\Omega \] done clear
  D)
          None of the above three values done clear
  View Solution play_arrow

• question_answer103)
  Five resistors of given values are connected together as shown in the figure. The current in the arm BD will be [MP PMT 1995]
  A)
                     Half the current in the arm ABC done clear
  B)
                     Zero done clear
  C)
                     Twice the current in the arm ABC done clear
  D)
                     Four times the current in the arm ABC done clear
  View Solution play_arrow

• question_answer104)
  In the network shown in the figure, each of the resistance is equal to \[2\,\Omega \]. The resistance between the points A and B is [CBSE PMT 1995]
  A)
                     \[1\,\Omega \] done clear
  B)
                     \[4\,\Omega \] done clear
  C)
                     \[3\,\Omega \] done clear
  D)
                     \[2\,\Omega \] done clear
  View Solution play_arrow

• question_answer105)
  In the arrangement of resistances shown below, the effective resistance between points A and B is                                                                        [MP PMT 1997; RPET 2001]
  A)
                     \[20\,\Omega \] done clear
  B)
                                       \[30\,\Omega \] done clear
  C)
                     \[90\,\Omega \]          done clear
  D)
             \[110\,\Omega \] done clear
  View Solution play_arrow

• question_answer106)
  Five resistances are connected as shown in the figure. The effective resistance between the points A and B is                                                [MP PMT 1999; KCET 2001; BHU 2001, 05]
  A)
          \[\frac{10}{3}\Omega \] done clear
  B)
          \[\frac{20}{3}\Omega \]   done clear
  C)
                     \[15\,\Omega \] done clear
  D)
                     \[6\,\Omega \] done clear
  View Solution play_arrow

• question_answer107)
  In the given figure, when galvanometer shows no deflection, the current (in ampere) flowing through \[5\,\Omega \] resistance will be                                                                                         [SCRA 1994, 96]
  A)
                     0.5 done clear
  B)
                     0.6 done clear
  C)
                     0.9 done clear
  D)
                     1.5 done clear
  View Solution play_arrow

• question_answer108)
  In the Wheatstone's bridge shown, \[P=2\,\Omega ,\] \[Q=3\,\Omega ,\] \[R=6\,\Omega \] and \[S=8\,\Omega \]. In order to obtain balance, shunt resistance across 'S' must be                                        [SCRA 1998]
  A)
             \[2\,\Omega \] done clear
  B)
                     \[3\,\Omega \] done clear
  C)
                     \[6\,\Omega \] done clear
  D)
                     \[8\,\Omega \] done clear
  View Solution play_arrow

• question_answer109)
  Five equal resistances each of value R are connected in a form shown alongside. The equivalent resistance of the network                                                     [Roorkee 1999]
  A)
          Between the points B and D is R done clear
  B)
          Between the points B and D is \[\frac{R}{2}\] done clear
  C)
          Between the points A and C is R                          done clear
  D)
          Between the points A and C is\[\frac{R}{2}\] done clear
  View Solution play_arrow

• question_answer110)
  In the circuit shown below the resistance of the galvanometer is 20 W.  In which case of the following alternatives are the currents arranged strictly in the decreasing order                                     [AMU (Engg.) 1999]
  A)
          \[i,\text{ }{{i}_{1,}}{{i}_{2}},{{i}_{g}}\] done clear
  B)
          \[i,\text{ }{{i}_{2,}}{{i}_{1}},{{i}_{g}}\] done clear
  C)
          \[i,\text{ }{{i}_{2,}}{{i}_{g}},{{i}_{1}}\] done clear
  D)
          \[i,\text{ }{{i}_{1,}}{{i}_{g}},{{i}_{2}}\] done clear
  View Solution play_arrow

• question_answer111)
  Potential difference between the points P and Q in the electric circuit shown is [KCET 1999]
  A)
          4.5 V done clear
  B)
          1.2 V done clear
  C)
          2.4 V done clear
  D)
          2.88 V done clear
  View Solution play_arrow

• question_answer112)
  The current between B and D in the given figure is [RPET 2000; DCE 2001]
  A)
          1 amp done clear
  B)
          2 amp done clear
  C)
          Zero done clear
  D)
          0.5 amp done clear
  View Solution play_arrow

• question_answer113)
  In the given figure, equivalent resistance between A and B will be                                           [CBSE PMT 2000]
  A)
          \[\frac{14}{3}\,\,\Omega \] done clear
  B)
          \[\frac{3}{14}\,\,\Omega \] done clear
  C)
          \[\frac{9}{14}\,\,\Omega \] done clear
  D)
          \[\frac{14}{9}\,\,\Omega \] done clear
  View Solution play_arrow

• question_answer114)
  In a typical Wheatstone network, the resistances in cyclic order are A = 10 W, B = 5 W, C = 4 W and D = 4 W for the bridge to be balanced                                                   [KCET 2000]
  A)
          10 W should be connected in parallel with A done clear
  B)
          10 W should be connected in series with A done clear
  C)
          5 W should be connected in series with B             done clear
  D)
          5 W should be connected in parallel with B done clear
  View Solution play_arrow

• question_answer115)
  In the circuit shown in figure, the current drawn from the battery is 4A.  If 10 W resistor is replaced by 20 W resistor, then current drawn from the circuit will be [KCET 2000; CBSE PMT 2001]
  A)
          1 A done clear
  B)
          2 A done clear
  C)
          3 A done clear
  D)
          0 A done clear
  View Solution play_arrow

• question_answer116)
  Calculate the equivalent resistance between A and B [UPSEAT 2001]
  A)
          \[\frac{9}{2}\Omega \] done clear
  B)
          3 W done clear
  C)
          6 W done clear
  D)
          \[\frac{5}{3}\Omega \] done clear
  View Solution play_arrow

• question_answer117)
  The equivalent resistance between P and Q in the given figure, is                             [MH CET (Med.) 2001]
  A)
          50 W done clear
  B)
          40 W done clear
  C)
          30 W done clear
  D)
          20 W done clear
  View Solution play_arrow

• question_answer118)
  If each of the resistance of the network shown in the figure is R, the equivalent resistance between A and B is [KCET 2002]
  A)
          5 R done clear
  B)
          3 R done clear
  C)
          R done clear
  D)
          R/2 done clear
  View Solution play_arrow

• question_answer119)
  The equivalent resistance of the following diagram A and B is                                                     [BCECE 2003]
  A)
          \[\frac{2}{3}\Omega \] done clear
  B)
          9 W done clear
  C)
          6 W done clear
  D)
          None of these done clear
  View Solution play_arrow

• question_answer120)
  Thirteen resistances each of resistance R ohm are connected in the circuit as shown in the figure below.  The effective resistance between A and B is                                  [KCET 2003]
  A)
          2R W done clear
  B)
          \[\frac{4R}{3}\,\,\Omega \] done clear
  C)
          \[\frac{2\,R}{3}\,\,\Omega \] done clear
  D)
          R W done clear
  View Solution play_arrow

• question_answer121)
  In a Wheatstone?s bridge all the four arms have equal resistance R.  If the resistance of the galvanometer arm is also R, the equivalent resistance of the combination as seen by the battery is                                              [CBSE PMT 2003]
  A)
          \[\frac{R}{2}\]               done clear
  B)
          R done clear
  C)
          2 R                                     done clear
  D)
          \[\frac{R}{4}\] done clear
  View Solution play_arrow

• question_answer122)
  For what value of unknown resistance X, the potential difference between B and D will be zero in the circuit shown in the figure                                                                     [MP PMT 2004]
  A)
             4 W done clear
  B)
                     6 W done clear
  C)
                     2 W done clear
  D)
                     5 W done clear
  View Solution play_arrow

• question_answer123)
  Which arrangement of four identical resistances should be used to draw maximum energy from a cell of voltage V [MP PMT 2004]
  A)
                                                                                                             done clear
  B)
          done clear
  C)
          done clear
  D)
          done clear
  View Solution play_arrow

• question_answer124)
  An unknown resistance R1 is connected in series with a resistance of 10 W. This combinations is connected to one gap of a metre bridge while a resistance R2 is connected in the other gap. The balance point is at 50 cm. Now, when the 10 W resistance is removed the balance point shifts to 40 cm. The value of R1 is (in ohm)                     [KCET 2004]
  A)
          60                                       done clear
  B)
          40 done clear
  C)
          20                                       done clear
  D)
          10 done clear
  View Solution play_arrow

• question_answer125)
  A wire has a resistance of 6 W. It is cut into two parts and both half values are connected in parallel. The new resistance is ....                                                             [KCET 2004]
  A)
          12 W                                  done clear
  B)
          1.5 W done clear
  C)
          3 W                                    done clear
  D)
          6 W done clear
  View Solution play_arrow

• question_answer126)
  Six equal resistances are connected between points P, Q and R as shown in the figure. Then the net resistance will be maximum between                                   [IIT-JEE (Screening) 2004]
  A)
          P and Q done clear
  B)
          Q and R done clear
  C)
          P and R done clear
  D)
          Any two points done clear
  View Solution play_arrow

• question_answer127)
  The total current supplied to the circuit by the battery is [AIEEE 2004]
  A)
          1 A done clear
  B)
          2 A done clear
  C)
          4 A done clear
  D)
          6 A done clear
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• question_answer128)
  An electric current is passed through a circuit containing two wires of the same material, connected in parallel. If the lengths and radii of the wires are in the ratio of 4/3 and 2/3, then the ratio of the currents passing through the wire will be [AIEEE 2004]
  A)
          3                                         done clear
  B)
          1/3 done clear
  C)
          8/9                                     done clear
  D)
          2 done clear
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• question_answer129)
  If a rod has resistance 4 W and if rod is turned as half cycle then the resistance along diameter   [BCECE 2004]
  A)
          1.56 W done clear
  B)
                         2.44 W done clear
  C)
          4 W                                    done clear
  D)
          2 W done clear
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• question_answer130)
  If three resistors of resistance 2W, 4W and 5 W are connected in parallel then the total resistance of the combination will be [Pb. PMT 2004]
  A)
          \[\frac{20}{19}\Omega \] done clear
  B)
          \[\frac{19}{20}\Omega \] done clear
  C)
          \[\frac{19}{10}\Omega \] done clear
  D)
          \[\frac{10}{19}\Omega \] done clear
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• question_answer131)
  In circuit shown below, the resistances are given in ohms and the battery is assumed ideal with emf equal to 3 volt. The voltage across the resistance R4 is [UPSEAT 2004; Kerala PMT 2004]
  A)
          0.4 V done clear
  B)
          0.6 V done clear
  C)
          1.2 V done clear
  D)
          1.5 V done clear
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• question_answer132)
  A parallel combination of two resistors, of 1 W each, is connected in series with a 1.5 W resistor. The total combination is connected across a 10 V battery. The current flowing in the circuit is                                    [DCE 2004]
  A)
          5 A                                     done clear
  B)
          20 A done clear
  C)
          0.2 A                                 done clear
  D)
          0.4 A done clear
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• question_answer133)
  If you are provided three resistances 2 W, 3 W and 6 W. How will you connect them so as to obtain the equivalent resistance of 4 W                                                           [DPMT 2003]
  A)
          done clear
  B)
                         done clear
  C)
                     done clear
  D)
                                    None of these done clear
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• question_answer134)
  The equivalent resistance and potential difference between A and B for the circuit is respectively            [Pb. PMT 2003]
  A)
          4 W, 8 V done clear
  B)
                         8 W, 4 V done clear
  C)
          2 W, 2 V                           done clear
  D)
          16 W, 8 V done clear
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• question_answer135)
  Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be [CBSE PMT 2004]
  A)
          \[\frac{3V}{R}\] done clear
  B)
          \[\frac{V}{R}\]              done clear
  C)
          \[\frac{V}{2R}\] done clear
  D)
          \[\frac{2V}{R}\] done clear
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• question_answer136)
  For the network shown in the figure the value of the current \[i\] is                                        [Kerala PMT 2005]
  A)
          \[\frac{9V}{35}\] done clear
  B)
          \[\frac{5V}{18}\] done clear
  C)
          \[\frac{5V}{9}\] done clear
  D)
          \[\frac{18V}{5}\] done clear
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• question_answer137)
  When a wire of uniform cross-section a, length l and resistance R is bent into a complete circle, resistance between any two of diametrically opposite points will be [CBSE PMT 2005]
  A)
          \[\frac{R}{4}\]           done clear
  B)
          \[\frac{R}{8}\] done clear
  C)
          \[4R\]                            done clear
  D)
          \[\frac{R}{2}\] done clear
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• question_answer138)
  The current in a simple series circuit is 5.0 amp. When an additional resistance of 2.0 ohms is inserted, the current drops to 4.0 amp. The original resistance of the circuit in ohms was                                          [KCET 2005]
  A)
          1.25                                   done clear
  B)
          8 done clear
  C)
          10                                       done clear
  D)
          20 done clear
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• question_answer139)
  In the circuit given E = 6.0 V, R1 = 100 ohms, R2 = R3 = 50 ohms, R4 = 75 ohms. The equivalent resistance of the circuit, in ohms, is                                                                          [KCET 2005]
  A)
          11.875 done clear
  B)
          26.31 done clear
  C)
          118.75 done clear
  D)
          None of these done clear
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• question_answer140)
  By using only two resistance coils-singly, in series, or in parallel one should be able to obtain resistances of 3, 4, 12 and 16 ohms. The separate resistances of the coil are [KCET 2005]
  A)
          3 and 4 done clear
  B)
                         4 and 12 done clear
  C)
          12 and 16                        done clear
  D)
          16 and 3 done clear
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• question_answer141)
  In the given circuit, the voltmeter records 5 volts. The resistance of the voltmeter in ohms is [KCET 2005]
  A)
          200 done clear
  B)
          100 done clear
  C)
          10 done clear
  D)
          50 done clear
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