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If rotational velocity of a dynamo armat...

If rotational velocity of a dynamo armature is doubled, then induced e.m.f. will become

A

half

B

two times

C

four times

D

unchanged

Text Solution

Verified by Experts

The correct Answer is:
B
emf generated = `NBA omega sin omega t`
As `omega` becomes double, emf generated also becomes double.
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