Physics
Magnetic-Effects-Of-Current-And-Magnetism
Easy
Question
A conducting ring of mass 2 kg and radius 0.5 m is placed on a smooth horizontal plane. The ring carries a current of i = 4 A. A horizontal magnetic field B = 10 T is switched on at time t = 0 as shown in figure. The initial angular acceleration of the ring will be
- 40
rad/s2 - 20 rad/s2
- 5 rad/s2
- 15 rad/s2
rad/s2 rad/s2 rad/s2 rad/s2The correct answer is: 40 rad/s2
Due to torque of magnetic field, ring will rotate about vertical diameter. 
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