A wheel has angular acceleration of 3.0 rad/sec² and an initial angular speed of 2.00 rad/sec. In a time of 2 sec it has rotated through an angle (in radian) of
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(a) […]
A drum of radius R and mass M, rolls down without slipping along an inclined plane of angle θ. The frictional force
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(a) Dissipates energy as heat (b) Decreases the rotational motion […]
One solid sphere A and another hollow sphere B are of same mass and same outer radii. Their moments of inertia about their diameters are respectively Iᴀ and Iʙ such that
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(a) […]
A circular disc X of radius R is made from an iron plate of thickness t and another disc Y of radius 4R is made from an iron plate of thickness t/4. Then the relation […]
A solid cylinder of mass M and radius R rolls without slipping down and inclined plane of length L and height h. What is the speed of its centre of mass when the cylinder reaches […]
The moment of inertia of a thin circular disc about an axis passing through its centre and perpendicular to its plane is I. Then the moment of Inertia of the disc about an axis parallel […]
The angular velocity of a wheel increases from 100 rps to 300 rps in 10 seconds. The number of revolutions made during that time is
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(a) 600 (b) 1500 (c) 1000 (d) […]
An electric kettle takes 4A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20⁰C? The temperature of boiling water is 100⁰C
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(a) 12.6 […]
The oscillating frequency of a cyclotron is 10 MHz. If the radius of its Dees is o.5 m, the kinetic energy of a proton, which is accelerated by the cyclotron is
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(a) 10.2 […]
A current I flows along the length of an infinitely long, straight, thin walled pipe. Then
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(a) the magnetic field at all points inside the pipe is the same, but not zero […]
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