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The radius of gyration of a rotating metallic disc is independent of the following physical quantity Position of axis of rotation Mass of disc Radius of disc Temperature of disc

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Moment of inertia of a body depends upon Distribution of mass of the body Position of axis of rotation Temperature of the body All are above

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Raw and boiled egg are made to spin on a smooth table by applying the same torque . The egg that spin faster is Raw egg Boiled egg Both will have same spin rate Difficult to predict

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A boiled egg and a raw egg of same mass and size are made to rotate about their own axis if 𝐼_1 and 𝐼_2 are moment of inertia of boiled egg and raw egg the 𝐼_1 = 𝐼_2 𝐼_1 < 𝐼_2 𝐼_1 > 𝐼_2 𝐼_1 =〖√2𝐼〗_2

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A uniform metal rod is rotated in horizontal plane about a vertical axis passing through its end at uniform rate . The tension in the rod is Same all point Different at different point and maximum at centre of rod Different at different point and minimum at axis of rotation Different at different point and maximum at axis of rotation

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2. 𝐼_1, 𝐼_2, are moment of inertia of two solid spheres of same mass about axes passing through their centres if first is made of wood and the second is made of steel then 𝐼_1 = 𝐼_2 𝐼_1 < 𝐼_2 𝐼_1 > 𝐼_2 𝐼_1 ≤ 𝐼_2

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The moment of inertia of a rigid body depends on A ) mass of body B) Position of axis of rotation C) Time period of its rotation D) Angular velocity of the body A and B are true B and C are true C and D are true A and D are true

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16. A positive charge ‘Q’ is fixed at a point . A negatively charged particle of mass ‘m’ and charge ‘q’ is revolving in a circular path of radius 𝑟_1 with Q as the centre . The work to be done to charge the radius of the circular path from 𝑟_1 to 𝑟_2 in joules is 0 𝑞𝑄/(4𝜋∈_0 ) [1/𝑟_1 −1/𝑟_2 ] 𝑞𝑄/(4𝜋∈_0 ) [1/𝑟_1 −1/𝑟_2 ] 1/𝑘 𝑞𝑄/(4𝜋∈_0 ) [1/𝑟_2 −1/𝑟_1 ]

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15. An insulated charged conducting sphere of radius 5cm has potential of 10v at the surface . What is the potential at centre? 10V ZERO Same as that at 5cm from the surface Same as that at 25cm from the surface

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14. Two positive charges 12𝜇C and 10 𝜇C are initially separated by 10cm . The work done in bringing the two charges 4cm closer is 7.2 J 3.6 J 8.4J 12.4J

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13.An electric cell does 5joules of work in carrying 10 coulombs of charge around a closed circuit . The emf of the cell is 2v 0.5v 4v 1v

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