Solved papers for JCECE Medical JCECE Medical Solved Paper-2012
done JCECE Medical Solved Paper-2012 Total Questions - 150
question_answer1) A monkey of 25 kg is holding a vertical rope. The rope does not break if a body of mass 30 kg is suspended from it, but the rope breaks if the mass of body suspended with the rope exceeds 30 kg. What will be the maximum acceleration with which the monkey can climb up along the rope?\[(Take\,g=10m{{s}^{-2}})\]
question_answer2) A mass of 10 g moving horizontally with a velocity of \[\text{100}\,\text{cm}{{\text{s}}^{-1}}\] strikes a pendulum bob of same mass. The two masses after collision stick together. What will be the maximum height reached by the system now? \[(Take\,g=10\,m{{s}^{-2}})\]
question_answer3) The three physical quantities x, y and z have units \[g\,c{{m}^{2}}{{s}^{-5}},g\,{{s}^{-1}}\]and \[cm{{s}^{-2}}\]respectively. The relation between x, y and z is
question_answer4) If a vector A having a magnitude of 8 is added to a vector B which lies along \[x-\]axis, then the resultant of two vectors lies along y-axis and has magnitude twice that of B. The magnitude of B is
question_answer7) The amplitude and the periodic time of a SHM are 5 cm and 6 s respectively. At a distance of 2.5 cm away from the mean position, the phase will be
question_answer10) Two point charges \[-\text{ }q\]and \[+\text{ }q/2\] are situated at the origin and the point (a, 0, 0) respectively. The point along the \[x-\]axis, where the electric field vanishes is
question_answer12) A current\[i\]ampere flows along the inner conductor of a coaxial cable and returns along the outer conductor of the cable, then the magnetic induction at any point outside the conductor at a distance r metre from the axis is
question_answer13) Two parallel long wires carry currents \[{{i}_{1}}\]and \[{{i}_{2}}\]with \[{{i}_{1}}>{{i}_{2}}.\]When the currents are in the same direction, the magnetic field midway between the wires is \[10\,\mu T.\] When the direction of \[{{i}_{2}}\] is reversed, it becomes \[40\mu T.\]Then, ratio of \[{{i}_{1}}/{{i}_{2}}\]is
question_answer14) The two coherent sources of equal intensity produce maximum intensity of 100 units at a point. If the intensity of one of the sources is reduced by 36% by reducing its width then the intensity of light at the same point will be
question_answer15) A convex mirror of focal length \[f\] forms an image which is \[\frac{1}{n}\] times the object. The distance of the object from the mirror is
question_answer16) Consider a hydrogen like atom whose energy in nth excited state is given by \[{{E}_{n}}=-\frac{13.6{{Z}^{2}}}{{{n}^{2}}},\] when this excited atom makes a transition from excited state to ground state, most energetic photons have energy \[{{E}_{\max }}=52.224\,eV\]and least energetic photons have energy \[{{E}_{\min }}=1.224\,eV.\] The atomic number of atom is
question_answer17) A diode is connected to \[\text{220}\,\text{V(rms)}\] AC in series with a capacitor as shown in figure. The voltage across the capacitor is
question_answer18) A wave travelling along positive \[x-\]axis is given by \[y=A\sin (\omega t-kx).\]If it is reflected from a rigid boundary such that 80% amplitude is reflected, then equation of reflected wave is
question_answer19) An engine approaches a hill with a constant speed. When it is at a distance of 0.9 km, it blows a whistle, whose echo is heard by the driver after 5 s. If speed of sound in air is 330 m/s, the speed of engine is
question_answer20) The graph between the resistive force F acting on a body and the distance covered by the body is shown in the figure. The mass of the body is 25 kg and initial velocity is 2 m/s. When the distance covered by the body is 4m, its kinetic energy would be
question_answer21) A body of weight 50 N placed on a horizontal surface is just moved by a force of 28.2 N. The frictional force and normal reaction are
question_answer22) On a railway curve, the outside rail is laid higher than the inside one so that resultant force exerted on the wheels of the rail car by the tops of the rails will
question_answer23) The mass of the moon is \[\frac{1}{81}\] of the earth but the gravitational pull is \[\frac{1}{6}\] of the earth. It is due to the fact that
A)
the radius of earth is \[\frac{9}{\sqrt{6}}\] of the moon
doneclear
B)
the radius of moon is \[\frac{81}{6}\] of the earth
question_answer25) The radius of two metallic spheres A and B are \[{{r}_{1}}\]and \[{{r}_{2}}\]respectively \[({{r}_{1}}>{{r}_{2}}).\] They are connected by a thin wire and the system is given a certain charge. The charge will be greater
question_answer26) The temperature gradient in a rod of 0.5 m long is \[80{{\,}^{o}}C/m.\] If the temperature of hotter end of the rod is \[30{{\,}^{o}}C,\] then the temperature of the cooler end is
question_answer27) Time period of a block suspended from the upper plate of a parallel plate capacitor by a spring of stiflhess K is T, when block is uncharged. If a charge q is given to the block then, the new time period of oscillation will be
question_answer29) A wire of length 1 m is moving at a speed of \[2\,m{{s}^{-1}}\] perpendicular to its length in a homogeneous magnetic field of 0.5T. If the ends of the wire are joined to a circuit of resistance \[6\Omega ,\] then the rate at which work is being done to keep the wire moving at constant speed is
question_answer31) The focal length of the objective of a terrestrial telescope is 80 cm and it is adjusted for parallel rays, then its power is 20. If the focal length of erecting lens is 20 cm, then full length of the telescope will be
question_answer32) Unpolarized light falls on two polarizing sheets placed one on top of the other. What must be the angle between the characteristic directions of the sheets if the intensity of the final transmitted light is one-third the maximum intensity of the first transmitted beam
question_answer33) The ratio of two specific heats of gas \[{{C}_{p}}/{{C}_{V}}\]for argon is 1.6 and for hydrogen is 1.4. If adiabatic elasticity of argon at pressure p is E, then at what pressure the adiabatic elasticity of hydrogen will also be equal to E?
question_answer34) The stress-strain curves for three wires of different materials are shown in figure, where P, Q and R are the elastic limits of the wires. He figure shows that
question_answer35) A body of density \[{{d}_{1}}\]is counterpoised by Mg of weights of density \[{{d}_{2}}\]in air of density d. Then, the true mass of the body is
question_answer37) A dip needle lies initially in the magnetic meridian when it shows an angle of dip \[\theta \] at a place. The dip circle is rotated through an angle \[x\]in the horizontal plane and then it shows an angle of dip\[\theta \]. Then, \[\frac{\tan \theta }{\tan \theta }\]will be
question_answer39) An electric bulb rated as 500W - 100V is used in a circuit having 200 V supply. The resistance R that must be put in series with the bulb, so that the bulb draws 500 W is
question_answer40) A string of length L and mass M hangs freely from a fixed point. Then, the velocity of transverse waves along the string at a distance \[x\]from the free end is
question_answer42) A body of mass 2 kg slides down a curve track which is quadrant of a circle of radius 1 m as shown in figure. All the surfaces are frictionless. If the body starts from rest, its speed at the bottom of the track is
question_answer44) If 10000 V is applied across an X-ray tube, what will be the ratio of de-Broglie wavelength of incident electrons to the shortest wavelength X-ray produced? \[\left( \frac{e}{m}\text{for}\,\text{electron}\,=1.8\times {{10}^{11}}C\,k{{g}^{-1}} \right)\]
question_answer46) Two capillary tubes of same radius r but of lengths \[{{l}_{1}}\]and \[{{l}_{2}}\] are fitted in parallel to the bottom of a vessel. The pressure head is p. What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before?
question_answer49) An optical fibre communication system works on a wavelength of 1.3 um The number of subscribers if can feed if a channel requires 20 kHz are
question_answer50) A system of logic gates is shown in the figure. From the study of truth table it can be found that to produce a high output (1) at R, we must have
question_answer54) A solution of sucrose (molar \[\text{mass}=342\,\text{g}\,\text{mo}{{\text{l}}^{-1}}\]) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of solution obtained will be (\[{{k}_{f}}\]for water\[=\text{1}\text{.86}\,\text{K}\,\text{kg}\,\text{mo}{{\text{l}}^{-1}}\])
question_answer55) The standard electrode potential of three metals X, Y and Z are \[\text{1}\text{.2 V,}\,\text{+}\,\,\text{0}\text{.5 V}\]and \[-\text{ 3}\text{.0}\,\text{V}\]respectively. The reducing power of these metals will be
question_answer56) The resistance of 1 N solution of acetic acid is \[250\Omega ,\]when measured in a cell having a cell constant of \[\text{1}\text{.15}\,\text{c}{{\text{m}}^{-1}}.\]The equivalent conductance \[({{\Omega }^{-1}}c{{m}^{2}}\,\text{equi}{{\text{v}}^{-1}})\] of 1 N acetic acid is
question_answer57) The thermal decomposition of a molecule shows first order kinetics. The molecule decomposes 50% in 120 min. How much time it will take to decompose 90%?
question_answer62) Which process of purifications is represented by the following scheme? \[\underset{impure}{\mathop{Ti}}\,+2{{I}_{2}}\xrightarrow{250{{\,}^{o}}C}Ti{{I}_{4}}\xrightarrow{1400{{\,}^{o}}C}\underset{Pure}{\mathop{Ti}}\,+2{{I}_{2}}\]
question_answer64) Which two of the following salts are used for preparing iodised salt? (i) \[KI{{O}_{3}}\] (ii) \[KI\] (iii) \[{{I}_{2}}\] (iv) \[HI\]
question_answer73) Consider the following reaction \[\text{Phenol}\xrightarrow{\text{Zn}\,\text{dust}}X\xrightarrow[\text{anhy}\,\text{AlC}{{\text{l}}_{\text{3}}}]{\text{C}{{\text{H}}_{\text{3}}}\text{cl}}Y\] \[\xrightarrow{\text{alk}\,\text{KMn}{{\text{O}}_{\text{4}}}}\text{Z}\] The product Z is
question_answer78) At\[25{{\,}^{o}}C,\] the dissociation constant of a base, BOH, is \[1.0\times {{10}^{-12}}.\]The concentration of hydroxyl ions in 0.01 M aqueous solution of the base would be
question_answer82) The mass of carbon anode consumed (giving only carbondioxide) in the production of 270 kg of aluminium metal from bauxite by the Hall process is (Atomic mass Al= 27)
question_answer86) A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three \[\alpha -\]particles in succession. The group of the periodic table to which the resulting daughter element would belong is
question_answer90) \[{{\text{H}}_{\text{2}}}\text{S}\]gas when passed through a solution of cations containing HCT precipitates the cations of second group of qualitative analysis but not those belonging to the fourth group. It is because
A)
presence of \[\text{HCl}\]decreases the sulphide ion concentration
doneclear
B)
presence of\[\text{HCl}\] increases the sulphide ion concentration
doneclear
C)
solubility product of group II sulphides is more than that of group IV sulphides
doneclear
D)
sulphides of group IV cations are. Unstable in \[\text{HCl}\]
question_answer91) The energy of second Bohr orbit of the hydrogen atom is \[-\,328\,\text{kJ}\,\text{mo}{{\text{l}}^{-1}};\] hence the energy of fourth Bohr orbit would be
question_answer92) Equilibrium constants \[{{K}_{1}}\]and \[{{K}_{2}}\]for the following equilibria \[NO(g)+\frac{1}{2}{{O}_{2}}N{{O}_{2}}(g)\] and \[2N{{O}_{2}}(g)2NO(g)+{{O}_{2}}(g)\]are related as
question_answer104) Two adjacent filaments of Spirogyra affinis each 10 cells participating in reproduction. How many new Spirogyra plants are produced during sexual reproduction?
question_answer119) All enzymes of TCA cycle are located in the mitochondrial matrix except one, which is located in inner mitochondrial membranes in eukaryotes and in cytpsol in prokaryotes. This enzyme is
question_answer133) Mating of an organisms to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration, is called
question_answer137) Every cell of the body contributes gemmules to the germ cells and so shares in the transmission of inherited characters, this theory is known as
question_answer138) Darwins finches provide an excellent evidence in favour of organic evolution. These are related to which of the following evidences?
question_answer149) Which one of the following palindromic base sequence in DNA can be easily cut at about the middle by some particular restriction enzyme?