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Question

Question: A square loop of side a is rotating about its diagonal with angular velocity w in a perpendicular ma...

A square loop of side a is rotating about its diagonal with angular velocity w in a perpendicular magnetic fieldB\overset{\rightarrow}{B}. It has 10 turns. The emf induced is–

A

B a2sin wt

B

B a2coswt

C

52\sqrt{2} Ba2

D

10 Ba2wsinwt

Answer

10 Ba2wsinwt

Explanation

Solution

f = BA cos q = BA cos wt

\ e = Ndφdt- N\frac{d\varphi}{dt}= NBA w sin wt = 10 BAw sin wt