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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

When a current carrying coil is placed in a uniform magnetic field of induction B, then a torque acts on it. If I is the current, n is the number of turns and a is the face area of the coil and the normal to the coil makes on angle with B, then

Answer: (C)

Solution

The torque is with , so when is the

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Question ID VK-078332