Education 299 Questions Ask question Search Order By: ActiveTagClear Filter 1 Votes 1 Ans A nucleus with mass number 240 breaks into two fragments each of mass number 120, the binding energy per nucleon of unfragmented nuclei is 7.6MeV while that of fragments is 8.5 MeV. The total gain in the Binding Energy in the process is (1) 0.9 MeV (2) 9.4 MeV (3) 804 MeV (4) 216 MeV 105 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 0 Votes 1 Ans A screw gauge gives the following readings when used to measure the diameter of a wire Main scale reading: 0 mm Circular scale reading: 52 divisions Given that 1 mm on the main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is (1) 0.52 cm (2) 0.026 cm (3) 0.26 cm (4) 0.052 cm 108 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since (1) A large aperture contributes to the quality and visibility of the images. (2) A large area of the objective ensures better light-gathering power. (3) A large aperture provides a better resolution. (4) All of the above 101 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A dipole is placed in an electric field as shown In which direction will it move? (1) Towards the left as its potential energy will increase. (2) Towards the right as its potential energy will decrease. (3) Towards the left as its potential energy will decrease. (4) Towards the right as its potential energy will increase. 110 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans An infinitely long straight conductor carries a current of 5 A as shown. An electron is moving with a speed of parallel to the conductor. The perpendicular distance between the electron and the conductor is 20 cm at an instant. Calculate the magnitude of the force experienced by the electron at that instant. 123 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans The velocity of a small ball of mass M and density d, when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is d/2 , then the viscous force acting on the ball will be 99 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans Two charged spherical conductors of radius R1 and R2 are connected by a wire. Then the ratio of surface charge densities of the spheres (σ1/σ2) is 133 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A nucleus of mass number 189 splits into two nuclei having mass number 125 and 64. The ratio of the radius of two daughter nuclei respectively is (1) 1 : 1 (2) 4 : 5 (3) 5 : 4 (4) 25 : 16 108 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans Two transparent media A and B are separated by a plane boundary. The speed of light in those media are and , respectively. The critical angle for a ray of light for these two media is 116 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A Wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable resistance Y as shown in the figure. For the most precise measurement of X, the resistances P and Q (1) Should be approximately equal to 2X (2) Should be approximately equal and are small (3) Should be very large and unequal (4) Do not play any significant role 126 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A capacitor of capacitance 900 pF is charged fully by 100 V battery B as shown in figure (a). Then it is disconnected from the battery and connected to another uncharged capacitor of capacitance C = 900 pF as shown in figure (b). The electrostatic energy stored by the system (b) is 124 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A big circular coil of 1000 turns and an average radius of 10 m is rotating about its horizontal diameter at 2 rad /s. If the vertical component of earth’s magnetic field at that place is and the electrical resistance of the coil is 12.56 Ω, then the maximum induced current in the coil will be (1) 0.25 A (2) 1.5 A (3) 1 A (4) 2 A 114 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 0 Votes 1 Ans A big circular coil of 1000 turns and an average radius of 10 m is rotating about its horizontal diameter at 2 rad /s. If the vertical component of earth’s magnetic field at that place is and the electrical resistance of the coil is 12.56 Ω, then the maximum induced current in the coil will be (1) 0.25 A (2) 1.5 A (3) 1 A (4) 2 A 109 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans Two point charges –q and +q are placed at a distance of L as shown in the figure. The magnitude of electric field intensity at a distance R(R >> L) varies as: 113 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A series LCR circuit with inductance 10 H capacitance 10 µF, and resistance 50 Ω is connected to an AC source of voltage, V = 200sin(100t) volt. If the resonant frequency of the LCR circuit is 0 ν and the frequency of the ac source is ν, then 116 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans From Amperes circuital law for a long straight wire of circular crosssection carrying a steady current, the variation of the magnetic field in the inside and outside region of the wire is (1) Uniform and remains constant for both the regions. (2) A linearly increasing function of distance up to the boundary of the wire and then linearly decreasing for the outside region. (3) A linearly increasing function of distance r up to the boundary of the wire and then decreasing one with 1/r dependence for the outside region. (4) A linearly decreasing function of distance up to the boundary of the wire and then a linearly increasing one for the outside region. 101 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans A ball is projected with a velocity 10 m/s at an angle of 60° with the vertical direction. Its speed at the highest point of its trajectory will be 108 viewsAditya Bhatt Answered question 13 February 2024EducationPhysics 1 Votes 1 Ans Two pendulums of length 121 cm and 100 cm start vibrating in phase. At some instant, the two are at their mean position in the same phase. The minimum number of vibrations of the shorter pendulum after which the two are again in phase at the mean position is: (1) 11 (2) 9 (3) 10 (4) 8 107 viewsAditya Bhatt Answered question 12 February 2024EducationPhysics 1 Votes 1 Ans Let T1 and T2 be the energy of an electron in the first and second excited states of hydrogen atoms, respectively. According to the Bohr’s model of an atom, the ratio T1 : T2 is (1) 1 : 4 (2) 4 : 1 (3) 4 : 9 (4) 9 : 4 119 viewsAditya Bhatt Answered question 12 February 2024EducationPhysics 1 Votes 1 Ans Plane angle and solid angle have (1) Units but no dimensions (2) Dimensions but no units (3) No units and no dimensions (4) Both units and dimensions 93 viewsAditya Bhatt Answered question 12 February 2024EducationPhysics « Previous 1 2 … 5 6 7 8 9 … 14 15 Next »
