A circular coil of 70 turns and radius 5 cm carrying a current of 8 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.5 T. The field lines an angle of 30° with the normal of the coil that magnitude of the counter torque that must be applied to prevent the coil from turning is
Text Solution
Verified by ExpertsThe correct answer is:
B
N= 70
The counter torque to prevent the coil from turning will be equal and opposite to the torque acting on the coil
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