A circular coil of 30 turns and radius 8...

A circular coil of 30 turns and radius 8.0 cm carrying current of 6.0 A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 T. The field lines make an angle of `60^@` with the normal to the coil. Calculate the magnitude of the counter torque, that must be applied to prevent the coil from turning.

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A circular coil of 30 turns and radius 8.0 cm carrying a current of 6.0A is suspended vertically in a uniform horizontal magnetic field of magnitude 1.0 .The field lines make an angle of 60^(@) with the normal of the coil. Calculate the magnitude of the counter torque that must be applied to prevent the coil turning.

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