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A loop shown in the figure is immersed i...

A loop shown in the figure is immersed in the varying magnetic field `B=B_0t`, directed into the page. If the total resistance of the loop is `R`, then the direction and magnitude of induced current in the inner circle is

A

clockwise `(B_0(pia^2-b^2))/R`

B

anticlockwise `(B_0pi(a^2+b^2))/R`

C

clockwise `(B_0(pia^2+4b^2))/R`

D

`clock wise (B_0(4b^2-pia^2))/R`

Text Solution

Verified by Experts

The correct Answer is:
D
`|e|=(dphi)/(dt)=S(dB)/(dt)=(4b^2-pia^2)B_0`
`i=(|e|)/R=((4b^2-pia^2)B_0)/R`
`ox` magnetic field is increasing. So, `o.` magnetic field is produced.
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