A rectangular coil of single turn, having area A,
rotates in a uniform magnetic field B with angular
speed w about an axis perpendicular to the field.
If initially the plane of the coil is perpendicular to
the field, then the average induced emf when it has
rotated through 90° is
Answers
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Initially flux,
After rotating through an angle
Flux through the coil is zero.
So,
Angular speed so, time period =
is time taken to rotate
So,
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