A closely wound search coil has an area of , turns, and a resistance of . It is connected to a charge-measuringinstrument whose resistance is . When the coil is rotated quickly from aposition parallel

A closely wound search coil has an area of , turns, and a resistance of . It is connected to a

charge-measuringinstrument whose resistance is . When the coil is rotated quickly from
aposition parallel to a uniform magnetic field to one
perpendicularto the field, the instrument indicates a charge of
.

What is the magnitude of the field?

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