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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.
(1.) Once per revolution
(2.) twice per revolution
(3.) four times per revoution
(4.) six time per revolution

A

Twice per revolution

B

Four times per revolution

C

Six times per revolution

D

Once per revolution

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The correct Answer is:
A
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