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A long straight wire is parallel to one edge of a rectangular loop as shown in figure-5.310. if the current in the long wire varies with time as `I=I_(0)e^(-tr)`, what will be the induced emf in the loop at t=`tau`?

A

`(mu_(0)bI)/(pitau)In((d+a)/(d))`

B

`(mu_(0)bI)/(2pitau)In((d+a)/(d))`

C

`(2mu_(0)bI)/(pitau)In("(d+a)/(d))`

D

`(mu_(0)bI)/(pitau)In((d)/(d+a))`

Text Solution

Verified by Experts

The correct Answer is:
C
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