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A conducing circular loop is placed in a...

A conducing circular loop is placed in a uniform magnetic field of 0.02 T, woth its plane perpendicular to the field. If the redius of the loop starts shrinking at a constant rate of `1.0 mm//s`, then find the emf induced in the loop, at the instant when radius is 4 cm.

Text Solution

Verified by Experts

The correct Answer is:
`5.0 muV`
`phi=BA=Bpir^(2) implies (dphi)/(dt)=Bpi2r(dr)/(dt)`
`e=-B2pir(dr)/(dt)`
`e=-0.02xx2xx3xx3.14xx4xx10^(-2)xx(-10^(-3))=5muV`
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