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question_answer1) Four dipoles of electric dipole moment p are put inside anon-metallic cube of side 'a', the total electric flux coming out of the cube would be (a) (b) (c) (d) none of these
question_answer2) A string is wound round a cylindrical wheel of moment of inertia and radius R. A mass m is attached to the free end of the string. Now, the mass is allowed to fall under gravity through a height h. Then after falling through height h (a) angular velocity of the wheel is (b) angular velocity of the wheel is (c) angular velocity of the wheel is (d) angular velocity of the wheel is
question_answer3) If g is acceleration due to gravity on the surface of a planet and is the mean density of the planet, then the correct relation between g and p is (a) (b) (c) (d)
question_answer4) A body which is just floating in a liquid (of same density),is pressed slightly and released. It will (a) start oscillations (b) sink to the bottom (c) come back to its initial position immediately (d) not come back to its initial point
question_answer5) What is the maximum mass of block A for which the system stays in equilibrium? [Given that the stepped cylinder of mass 4 kg has radii R and R / 2.] (a) 2 kg (b) 4 kg (c) 3 kg (d) 1.5 kg
question_answer6) In the adjacent figure, pressure inside the piston is P and height of water in the capillary is h. Now, choose the correct graph from the following.
question_answer7) A particle moves in a circle of radius 25 cm such that the magnitudes of its tangential and normal accelerations are equal at any instant. If it completes its first revolution in sec then its initial velocity was (a) (b) (c) (d)
question_answer8) From a sphere of electrical conductivity K, two planes cut a piece such that the first plane passes through the centre of the sphere and the second (parallel to the first one) passes at a distance R/2 from the centre. Then the resistance between A and B is (a) (b) (c) (d) none of these
question_answer9) A given LCR series circuit satisfies the condition for resonance with a given AC source. If the angular frequency of the AC source is increased by 100% then in order to establish resonance, without changing the value of inductance, the capacitance must be (a) increased by 100% (b) reduced by 50% (c) increased by 75% (d) reduced by 75%
question_answer10) The end A of a uniform ladder AP of length 5 m, kept inclined to a vertical wall is slipping over a horizontal surface with velocity of 2 m/s, when A is at a distance of 3 m from the wall. Velocity of centre of mass of ladder at this moment is (a) 1.25 m/s (b) 0 m/s (c) 1 m/s (d) 2 m/s
question_answer11) A square loop of side 4 cm is lying on a horizontal table. A uniform magnetic field of 0.5 T is directed downwards a tan angle of 60? to the vertical as shown in figure. If the field increases from zero to its final value in 0.2 s, the emfinduced in the loop will be (a) 1 mV (b) 2 mV (c) 3 mV (d) 4 mV
question_answer12) Variation of internal energy with density of one mole of monotonic gas is depicted in the adjoining figure, corresponding variation of pressure with volume can be depicted as (the curve is rectangular hyperbola)
question_answer13) Three bodies A, B and C of masses m, m and respectively are supplied heat at a constant rate. The change in temperature versus time t graph for A, B and C are shown by I, II and III respectively. If their specific heat capacities are and respectively then which of the following relations is correct? (Initial temperature of body is 0?C) (a) (b) (c) (d)
question_answer14) The time period of a pendulum at temperature is sec. Its time period at is sec. If coefficient of linear expansion of material of pendulum is , then increase in time period is (a) (b) (c) (d) none of these
question_answer15) A body of mass 'm' is released from rest on an inclined plane in an elevator moving up with acceleration . Find the time taken by the body to reach the bottom of the inclined plane. (a) (b) (c) (d)
question_answer16) A block Q of mass 2m is placed on a horizontal frictionless plane. A second block of mass m is placed on it and is connected to a spring of spring constant K. The two block are pulled by distance A. Block Q oscillates without slipping. The work done by the friction force on block Q when the spring attains its natural length is (a) (b) (c) (d)
question_answer17) A V shaped rod kept inside a magnetic field of strength is carrying a current . If then the net magnetic force on the rod is (a) (b) (c) zero (d)
question_answer18) Let and denote the magnitude of the net force by a proton on a proton, by a proton on a neutron and by a neutron on a neutron respectively. Neglect gravitational force. When the separation is 1 fm, (a) (b) (c) (d)
question_answer19) Binding energy per nucleon vs mass number curve for nuclei is shown in the figure. W, X, Y and Z are four nuclei indicated on the curve. The process that would release energy is (a) (b) (c) (d)
question_answer20) A charged particle enters into a uniform magnetic field with velocity perpendicular to it. The length of magnetic field is where R is the radius of the circular path of the particle in the field. The magnitude of change in velocity of the particle when it comes out of the field is (a) (b) (c) (d)
question_answer21) The figure shows a schematic diagram showing the arrangement of Young's double slit experiment Distance between slits is d. Choose the correct statement related to wavelength of light used. (a) Larger the wavelength of light larger the fringe width. (b) If white light is used in YDSE, then the violet colour forms its first maxima closest to the central maxima. (c) The central maxima of all the wavelengths coincide. (d) All the above statements are correct
question_answer22) A ray of light falls on the surface of spherical glass(having refractive index n) making angle 30? with normal then net angle of deviation between emergent and incident rays is (a) (b) Zero (c) (d)
question_answer23) The graph shows the extension of a wire of length 1 m suspended from the top of a roof at one end and a load connected to the other end. If the cross-sectional area of the wire is , calculate the Young's modulus (i.e, Y) of the material of the wire in S.I units (a) 2 x 106 N/m2 (b) 5 x 106 N/m2 (c) 2 x 1011 N/m2 (d) 5 x 1011 N/m2
question_answer24) Identify a spring mass system which has a different time period compared to the system shown in figure.
question_answer25) The frequency of sonometer wire is f. The frequency becomes f/2 when the mass producing the tension is completely immersed in water and on immersing the mass in a certain liquid, frequency becomes f/3. The relative density of the liquid is (a) 1.32 (b) 1.03 (c) 1.41 (d) 1.18
question_answer26) A string of mass m and length is hanging from ceiling as shown in the figure. Wave in string move upward, and are the speed of wave at A and B respectively. Then is (a) (b) (c) (d)
question_answer27) Initial charge on conducting sphere of radius r is If S is closed at then charge on the sphere at any time t is (a) (b) (c) (d) none of these
question_answer28) The process of superimposing signal frequency (i.e. audio wave) on the carrier wave is known as (a) Transmission (b) Reception (c) Modulation (d) Detection
question_answer29) An electric field is applied to a semiconductor. Let the number of charge carrier density is 'n' and the averagedrify speed be . If the temperature is increased (a) both n and v will increase. (b) n will increase but v will decrease. (c) v will increase but n will decrease. (d) both n and v will decrease.
question_answer30) The property possessed by only ferromagnetic materials is (a) Attracting magnetic substances (b) Hysteresis (c) Susceptibility independent of temperature (d) Directional property
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