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A square loop of side b is rotated in a ...

A square loop of side `b` is rotated in a constant magnetic field `B` at angular frequency `omega` as shown in the figure. What is the emf induced in it?

A

`b^2Bomegasinomegat`

B

`b Bomegasin^2omegat`

C

`bB^2cosomegat`

D

`b^2bomega`

Text Solution

Verified by Experts

The correct Answer is:
A
At time `t` angle rotated by loop is `theta=omegat.` this is also the angle between `B` and `S`. Then ,
`phi=BScostheta`
`=Bb^2cosomegat`
`e=|(dphi)/(dt)|=b^2 Bomega sin omegat`
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