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question_answer1) What is the moment of inertia of a uniform solid hemisphere of mass M and radius R about an axis parallel to one of the diameters of the plane cross section and at a distancefrom it (a) (b) (c) (d)
question_answer2) A coin is placed on a rough horizontal plat form with coefficient of friction 4 oscillating simple harmonically at angular frequency co in a horizontal plane. Coin does not slip on the platform. The amplitude of oscillation is gradually increased. The coin will begin to slip for the first time. (a) For an amplitude of (b) For an amplitude of (c) At mean position (d) For an amplitude of
question_answer3) Two blocks of masses and are suspended from a massless pulley by means of a massless string and two massless springs which of the following are not true. (a) (b) (c) (d)
question_answer4) From the figure, which of the following are true (a) is the position of stable equilibrium, is neutral equilibrium, unstable equilibrium. (b) is the position of neutral equilibrium, is stable equilibrium, is unstable. (c) is the position of neutral equilibrium, is unstable equilibrium, is stable. (d) is the position of stable equilibrium and are unstable equilibrium.
question_answer5) AB, EC and CD are three equal uniform rods firmly joined, so as to form the three adjacent sides of a regular hexagon and is suspended from the point A. What angle will the side CD make with the horizontal? (a) zero (b) 30? (c) 15? (d) 45?
question_answer6) A hollow cylinder with bottom floats in water as shown in the figure. With its axis vertical and a depth of 10cm immersed. The cylinder develops a leak, for what minimum value of the height 'H' the cylinder will sink. (a) 20 cm (b) 24 cm (c) 28.18 cm (d) 40 cm
question_answer7) In the arrangement shown magnetic field increases at a rate ofinto the plane of paper. For what value ofcurrent through AS is zero? (a) 2 (b) (c) 1 (d) 2
question_answer8) A parallel plate air capacitor is connected to a battery. If the plates of the capacitor are pulled apart then (a) net charge supplied by the battery increases (b) electric field between the plates decreases. (c) some additional charges on the positive plates of the capacitor are added to the capacitor from the battery. (d) no work is required to be done in pulling the plates apart.
question_answer9) A square loop made of side 'a' and an arc of radius of curvature a/2 are arranged such that current flows in ABCDEA. The magnetic field at O is (a) (b) (c) (d)
question_answer10) An artificial satellite is in circular orbit around the earth. The universal gravitational constant starts decreasing at a constant rate with respect to time. Which of the following is true regarding the satellite? (a) Angular momentum about the centre of the earth will uniformly vary with time. (b) Potential energy will uniformly decreases. (c) Angular momentum about the centre of the earth remains constant. (d) The satellite gradually spirals into earth.
question_answer11) Face AC of a right angled prismis coated with a thin film of liquid as shown in the figure. Light is allowed to fall normally on the face AB of the prism. In order that the ray of light gets totally reflected at AB, the maximum refractive index of the liquid should be (a) 1.1 (b) 1.2 (c) 1.3 (d) 1.4
question_answer12) The fraction of a radioactive material remains after two average life time is (a) (b) (c) (d)
question_answer13) Ice block is floating in water contained in a cylindrical vessel. Inside ice, cork ball is embedded. (Density of cork is less than that of ice). After ice melts, the water level in vessel (a) rises (b) falls below (c) remains same (d) data is in sufficient.
question_answer14) A rod of length 10cm made up of conducting and no conducting material is as shown. The shaded part is non conducting. The rod is rotated with constant angular velocity 10 rad/s about O in constant magnetic field of 2 Tesla. The induced emf between the points B and A of rod will be (a) 103 volts (b) 0.1 volt (c) 0.051 volt (d) Cannot be determined
question_answer15) Two charges of charge + q are placed at distance 'd' from the centre of solid conductor in the shape of a cube, as shown in the figure. The electric field at the centre of cube due to induced charges only will be equal to (a) (b) (d) (d) Zero
question_answer16) Two gases A and B are taken along similar adiabatic process. The P-T graph for both the gases is shown in the figure. The gases A and B are respectively (a) and Ne (b) and (c) Ne and (d) Ne and Ar
question_answer17) A diathermic cylinder filled with 1 mole monatomic gas with movable piston is submerged in boiling water at1 atm. After some time the volume becomes double. The work done by the gas will be (a) 69.42 R J (b) zero (c) 189.2R J (d) 285.5R J
question_answer18) The snap shot of a standing wave is given the particle a, b, c & d of the medium at an instant move as follows. (a) a & b moves to upwards and b, d downwards (b) a & b move downwards and c & d upwards (c) a & d upwards and b & c downwards (d) a, b, c & d all moves upward
question_answer19) A uniform sphere of mass M is suspended in a fluid of density through a thin string as shown in figure. The string remains taut. The net force on sphere due to fluid is (a) (b) (c) (d) None of these
question_answer20) Two small pulses in a stretched string whose centres are initially 8cm apart are moving towards each other as shown in figure. The speed of pulses is 2 cm/s. After2.5 seconds, the total energy of the pulse will be (a) zero (b) purely kinetic (c) purely potential (d) partly kinetic and partly potential
question_answer21) In Young's double slit experiment, plane of slits and screen lies in y - z plane. Distance between plane of slits and screen is D (D >> d). The distance between the source S and plane of slits at time t = 0 is D / 2. If the source is at [(0, 0)] at t = 0, and moves along positive-axis with velocity m/s. The velocity of central bright fringe will be (a)upward direction. (b)downward direction. (c)downward direction. (d)upward direction.
question_answer22) A particle 'A' moves along a circle of radius so that its radius vector relative to the point O rotates with the constant angular velocity rad/s. The acceleration of the particle is (a) (b) (c) (d)
question_answer23) The temperature at which the root-mean square speed of hydrogen molecules will be equal to the escape velocity from the gravitational field of the earth is (a) 20,000 K (b) 273 K (c) 10,000 K (d) 0 K
question_answer24) The temperature of an isolated black body falls from to in rime t. Then, (Take k in the following options to be a constant.) (a) (b) (c) (d)
question_answer25) A photon of energy 12.1 eV corresponds to light of wavelength .Due to an electron transit from n = 3 ton = 1 in a hydrogen atom, light of wavelength is emitted. If we take into account the recoil of the atom when the photon is emitted, then (a) (b) (c) (d) data in sufficient
question_answer26) Three charges + 2Q, -3Q and -Q are arranged in a line as shown in the figure. The number of points along the line at which the net electric field is zero is (a) 1 (b) 2 (c) 3 (d) more than 3
question_answer27) When current is passes through a metal wire, the temperature of the wire rises because (a) collision of conduction electrons with the atoms of metals gives die energy which appears as heat. (b) when electron falls from higher energy level to a lower energy level, heat energy is released. (c) collision of metal atom with each other releases heat energy. (d) None of the above
question_answer28) Soft iron is used for making electromagnets because its: (a) magnetic saturation limit is high and retentively and coercively are small. (b) Retentively is high (c) Coercively is high (d) Area of hysteresis loop is large.
question_answer29) A diode as a rectifier converts (a) alternating current into direct current (b) direct current into alternating current (c) high voltage into low voltage (d) low voltage into high voltage
question_answer30) A compound microscope has a magnifying power of 100when the image is formed at infinity. The objective has focal length of 0.5 cm and the tube length is 6.5 cm. The focal length of the eye-piece is (a) 1 cm (b) 2 cm (c) 3 cm (d) 0.5 cm
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