# A closed coil having 100 turns is rotated in a uniform magnetic field B=4.0 x10-4 T about a diameter which is perpendicular to the field. the angular velocity of rotation is 300 revolutions/min.The area of the coil is 25 cm2 and its resistance is 4.0 Ω. Find (a) the average emf devoloped in half a turn from a position where the coil is perpendicular to the magnetic field,(b) the average emf in a full turn and (c) the net charge displaced in part (a).

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