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A wire loop is rotated in magneitc field...

A wire loop is rotated in magneitc field. The frequency of change of direction of the induced e.m.f. is.

A

Once per revolution

B

twce per revolution

C

four times per revolution

D

six times per revolution

Text Solution

Verified by Experts

The correct Answer is:
B
This is the case of periodic `EMI`

From graph,
From graph, it is clear that direction is changing once in `(1)/(2)` cycle.
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