A square coil of side 30 cm with 500 turns is kept in uniform magnetic field of 0.4 T. The plane of the coil is inclined at an angle of 30° to the field. The magnetic flux through the coil is *
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When a coil is rotated in a uniform magnetic field at a certain frequency, the variation with time t of the induced emf E is as shown below. The frequency of rotation of the coil is reduced to one half of its initial value.
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