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A circular coil with cross - sectional a...

A circular coil with cross - sectional area `0.1 cm^(2)` is kept in a uniform magnetic field of strength `0.2` T. If the current passing in the coil is 3 A and plane of the loop is perpendicular to the direction of magnetic field . Calculate
(a) total torque on the coil
(b) total force on the coil
(c ) average force on each electron in the coil due to the magnetic field of the free electron density for the material of the wire is `10^(28) m^(-3)` .

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