question_answer2) The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Youngs double-slit experiment, is
question_answer3) Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged, is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is
question_answer5) A particle starting from the origin (0, 0) moves in a straight line in the \[(x,y)\] plane. Its coordinates at a later time are \[(\sqrt{3,}3.)\]. The path of the particle makes with the x-axis an angle of
question_answer6) A wheel has angular acceleration of \[3.0\text{ }rad\text{/}{{s}^{2}}\]and an initial angular speed of 2.00 rad/s. In a time of 2 s it has rotated through an angle (in radian) of
question_answer7) The resistance of an ammeter is 13\[\Omega \] and its scale is graduated for a current upro 100 A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 A by this meter. The value of shunt resistance is
question_answer8) Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius R with constant speed v. The time period of the motion
question_answer9) The primary and secondary coils of a transformer have 50 and 1500 turns respectively. If the magnetic flux \[\phi \] linked with the primary coil is given by\[\phi ={{\phi }_{0}}+4t,\] where \[\phi \] is in weber, t is time in second and\[{{\phi }_{0}}\] is a constant, the output voltage across the secondary coil is
question_answer10) The frequency of a light wave in a material is \[2\times {{10}^{14}}Hz\] and wavelength is\[5000\,\overset{\text{o}}{\mathop{\text{A}}}\,\]. The refractive index of material will be
question_answer11) A car moves from X to Y with a uniform speed \[{{v}_{u}}\] and returns to Y with a uniform speed \[{{v}_{d}}.\] The average speed for this round trip is
question_answer12) A particle executes simple harmonic oscillation with an amplitude \[a.\] The period of oscillation is T. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is
question_answer13) A block B is pushed momentarily along a horizontal surface with an initial velocity v. If \[\mu \] is the coefficient of sliding friction between B and the surface, block B will come to rest after a time
question_answer14) Two radioactive substances A and B have decay constants \[5\lambda \] and \[\lambda \] respectively. At t = 0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be \[{{\left( \frac{1}{e} \right)}^{2}}\]after a time interval
question_answer15) A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is approximately
question_answer16) A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment \[\mu \] is given by
question_answer17) A steady current of 1.5 A flows through a copper voltameter for 10 min. If the electrochemical equivalent of copper is \[30\times {{10}^{-5}}g\,{{C}^{-1}},\] the mass of copper deposited on the electrode will be
question_answer18) In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular paths of radius R using a magnetic field B. If V and B are kept constant, The ratio\[\left( \frac{\text{charge}\,\text{on}\,\text{the}\,\text{ion}}{\text{mass}\,\text{of}\,\text{the}\,\text{ion}} \right)\]will be proportional to
question_answer19) Three resistances P, Q, R each of \[2\Omega \] and an unknown resistance S form the four arms of a Wheatstones bridge circuit. When a resistance of \[6\Omega \] is connected in parallel to S the bridge gets balanced. What is the value of S?
question_answer20) Two satellites of earth, \[{{S}_{1}}\] and \[{{S}_{2}},\] are moving in the same orbit. The mass of \[{{S}_{1}}\] is four times the mass of \[{{S}_{2}}.\] Which one of the following statements is true?
A)
The time period of\[{{S}_{1}}\]is four times that of\[{{S}_{2.}}\]
doneclear
B)
The potential energies of earth and satellite in the two cases are equal
doneclear
C)
\[{{S}_{1}}\]and\[{{S}_{2}}\]are moving with the same speed
doneclear
D)
The kinetic energies of the two satellites are equal
question_answer21) An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency?
question_answer22) A coil of inductance 300 mH and resistance\[2\Omega \] is connected to a source of voltage 2 V. The current reaches half of its steady state value in
question_answer23) The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let \[{{D}_{1}}\] and \[{{D}_{2}}\]be angles of minimum deviation for red and blue light respectively in a prism of this glass, then,
A)
\[{{D}_{1}}<{{D}_{2}}\]
doneclear
B)
\[{{D}_{1}}={{D}_{2}}\]
doneclear
C)
\[{{D}_{1}}\] can be less than or greater than\[{{D}_{2}}\] depending upon the angle of prism
question_answer24) A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. The work done by the force of gravity during the time the particle goes up is
question_answer25) A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of \[45{}^\circ \] with the initial vertical direction is
question_answer27) If M0 is the mass of an oxygen isotope\[_{8}{{O}^{17}},\]\[{{M}_{P}}\]and \[{{M}_{n}}\] are the masses of a proton and a neutron, respectively, the nuclear binding energy of the isotope is
question_answer30) A charged oil drop is suspended in unifor m field of \[3\times {{10}^{4}}\,V\text{/}m\]so that it neither falls nor rises. The charge on the drop will be (Take the mass of the charge \[=9.9\times {{10}^{-15}}kg\]and\[g=10\,m\text{/}{{s}^{2}}\])
question_answer31) Dimensions of resistance in an electrical circuit, in terms of dimension of mass M, of length L, of time T and of current \[I\], would be
question_answer32) An alpha nucleus of energy \[\frac{1}{2}\,m{{v}^{2}}\] bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to
question_answer33) The work of 146 kJ is performed in order to compress one kilo mole of a gas adiabatically and in this process the temperature of the gas increases by\[7{}^\circ C\]. The gas is \[\left( R=8.3\,J\,mo{{1}^{-1}}{{K}^{-1}} \right)\]
question_answer35) A frame made of metallic wire enclosing a surface area A is covered with a soap film. If the area of the frame of metallic wire is reduced by 50%, the energy of the soap film will be changed by
question_answer36) Mercury boils at \[367{}^\circ C\]. However, mercury thermometers are made such that they can measure temperature upto \[500{}^\circ C\]. This is done by
A)
maintaining vacuum above mercury column in the stem of the thermometer
doneclear
B)
filling nitrogen gas at high pressure above the mercury column
doneclear
C)
filling oxygen gas at high pressure above the mercury column
doneclear
D)
filling nitrogen gas at low pressure above the mercury column
question_answer37) In a laboratory four convex lenses \[{{L}_{1,}}{{L}_{2,}}{{L}_{3}}\] and \[{{L}_{4}}\] of focal lengths 2, 4, 6 and 8 cm, respectively are available. Two of these lenses form a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are respectively
question_answer38) A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is 4D, the power of a cut lens will be
question_answer47) In an oxidation-reduction, reaction, \[MnO_{4}^{-}\] ion is converted to \[M{{n}^{2+}}.\] What is the number of equivalents of \[KMn{{O}_{4}}\] (mol. wt. = 158) present in 250 mL of 0.04 M \[KMn{{O}_{4}}\]solution?
question_answer49) The heat of formation of\[CO(g)\] and \[C{{O}_{2}}(g)\]are \[\Delta H=-110\] and\[\Delta H=-393\,kJ\,mo{{l}^{-1}}\] respectively. What is the heat of reaction \[(\Delta H)\] (in kJ\[mo{{l}^{-1}}\]) for the following reaction? \[CO(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}C{{O}_{2}}(g)\]
question_answer50) What is the wavelength (in m) of a particle of mass \[6.62\times {{10}^{-29}}g\]moving with a velocity of \[{{10}^{3}}m{{s}^{-1}}\]?
question_answer51) What is the electrode potential (in V) of the following electrode at \[25{}^\circ C\]? \[N{{i}^{2+}}(0.1\,M)|\,\,Ni(s)\] (Standard reaction potential of \[N{{i}^{2+}}|\,\,Ni\] is\[-\,0.25\,V,\,\frac{2.303\,RT}{F}=0.06\])
question_answer52) What is the equation for the equilibrium constant \[({{K}_{c}})\] for the following reaction? \[\frac{1}{2}A(g)+\frac{1}{3}B(g)\frac{2}{3}C(g)\]
question_answer55) A 0.5 g/L solution of glucose is found to be isotonic with a 2.5 g/L solution of an organic compound. What will be the molecular weight of that organic compound?
question_answer61) The reaction, \[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\xrightarrow{{}}\]\[{{C}_{6}}{{H}_{5}}CH=CHCOO{{C}_{2}}{{H}_{5}}\] is called
question_answer64) What are the values of \[{{n}_{1}}\] and \[{{n}_{2}}\] respectively for \[{{H}_{\beta }}\] line in the Lyman series of hydrogen atomic spectrum 44?
question_answer66) A \[0.1\] aqueous solution of a weak acid is 2% ionised. If the ionic product of water is \[1\times {{10}^{-4}},\] the \[[O{{H}^{-}}]\] is
question_answer73) 9.2 g \[{{N}_{2}}{{O}_{4}}\] is heated in a 1 L vessel till equilibrium state is established \[{{N}_{2}}{{O}_{4}}(g)2N{{O}_{2}}(g)\] In equilibrium state 50%\[{{N}_{2}}{{O}_{4}}\]was dissociated, equilibrium constant will be (mol. wt. of \[{{N}_{2}}{{O}_{4}}=92\])
question_answer115) A bacterium divides after every 35 min., if a culture containing 10s cells per ml is grown, then cell concentration per ml after 175 min will be
question_answer161) Directions: In each of the following questions, choose the alternative which best expresses the meaning of the given idiom/phrase. A pipe dream
question_answer162) Directions: In each of the following questions, choose the alternative which best expresses the meaning of the given idiom/phrase. To give up the ghost
question_answer163) Directions: In each of the following questions, choose the alternative which best expresses the meaning of the given idiom/phrase. To disabuse ones mind
A)
To conceal something
doneclear
B)
To remove a misapprehension
doneclear
C)
To banish from ones mind a thought
doneclear
D)
To proceed cautiously so as to avoid risks and dangers
question_answer164) Directions: In each of the following questions, choose the alternative which best expresses the meaning of the given idiom/phrase. To wrangle over an asss shadow
question_answer165) Directions: In each of the following questions, choose the alternative which best expresses the meaning of the given idiom/phrase. To be at daggers drawn
question_answer166) Directions: Choose the correct alternative to fill in the blank. According to corporate circles, Datta is pushing through the merger to create a financially ___ company in the processed foods business, the groups thrust area for the 1990s.
question_answer167) Directions: Choose the correct alternative to fill in the blank. A man who is well-bred and honourable in-variably shows __ for the feelings of other people.
question_answer168) Directions: Choose the correct alternative to fill in the blank. You will have to face some practical problems when you start __ this plan.
question_answer169) Directions: Choose the correct alternative to fill in the blank. Speeding and blocking are traffic offences which lead to __ accidents.
question_answer170) Directions: Choose the correct alternative to fill in the blank. The more your action and thought are allied and __, the happier you grow.
question_answer171) Directions: In each of the following questions, rearrange the parts P, Q, R and S to make a proper sentence. Around the world, painful terminal diseases/(P), the question of human death/(Q), people are wrestling with /(R), especially in the face of/(S)
question_answer172) Directions: In each of the following questions, rearrange the parts P, Q, R and S to make a proper sentence. The specific, ability requirements of the job/(P), depend on the/(Q), required for adequate job performance/(R), intellectual or physical abilities/CS)
question_answer173) Directions: In each of the following questions, rearrange the parts P, Q, R and S to make a proper sentence. Freedom, is the restricted kind in the sense/(P), the rich and the poor woman/(Q), that a wide gulf separates/(R), which a modem woman enjoys/(S)
question_answer174) Directions: In each of the following questions, rearrange the parts P, Q, R and S to make a proper sentence. In life, some rules are/ (P), as in business/(Q),they seem almost instinctive/(R), learnt so early that/(S)
question_answer175) Directions: In each of the following questions, rearrange the parts P, Q, R and S to make a proper sentence. Kapil, left in an aeroplane/(P), after reading a sailing magazine/(Q), had decided/(R), to build his own boat nine years earlier/ (S)
question_answer181) Directions: In each of the following questions, choose the alternative which is most nearly the same in meaning to the word given in italics in the sentence. The rancous shouts of the audience forced the management to call off the show.
question_answer182) Directions: In each of the following questions, choose the alternative which is most nearly the same in meaning to the word given in italics in the sentence. At the Hardy house there was great consternation when Aunt Gertrude saw Joe helping Frank up the stairs.
question_answer183) Directions: In each of the following questions, choose the alternative which is most nearly the same in meaning to the word given in italics in the sentence. Methods of spreading the family planning message have been as/fecund as they have been abortive.
question_answer184) Directions: In each of the following questions, choose the alternative which is most nearly the same in meaning to the word given in italics in the sentence. Now the fury of the demonstrators turned against the machines.
question_answer185) Directions: In each of the following questions, choose the alternative which is most nearly the same in meaning to the word given in italics in the sentence. Everyone who has worked for him hammers home that point because they feel that it is widely unappreciated.
question_answer186) Directions: In each of the following questions, choose the alternative which is opposite in meaning to the word given in italics in the sentence. Here debonair manners were noticed by everyone present in the city.
question_answer187) Directions: In each of the following questions, choose the alternative which is opposite in meaning to the word given in italics in the sentence. Like poverty, affluence can sometimes create its own problems.
question_answer188) Directions: In each of the following questions, choose the alternative which is opposite in meaning to the word given in italics in the sentence. It is surprising to find her condoning such an act.
question_answer189) Directions: In each of the following questions, choose the alternative which is opposite in meaning to the word given in italics in the sentence. He proved utterly capricious in his dealings with his friends.
question_answer190) Directions: In each of the following questions, choose the alternative which is opposite in meaning to the word given in italics in the sentence. As long as he remained in that office, he maintained his hegemony.
question_answer191) Directions: In each of the following questions, choose the alternative which can be substituted for the given words/sentence. Medical study of the skin and its diseases
question_answer192) Directions: In each of the following questions, choose the alternative which can be substituted for the given words/sentence. Code of diplomatic etiquette and precedence
question_answer193) Directions: In each of the following questions, choose the alternative which can be substituted for the given words/sentence. The branch of medical science which deals with the problems of the old
question_answer194) Directions: In each of the following questions, choose the alternative which can be substituted for the given words/sentence. One who promotes the idea of absence of government of any kind, when every man should be a law unto himself
question_answer195) Directions: In each of the following questions, choose the alternative which can be substituted for the given words/sentence. Design made by putting together colored pieces of glass or stones