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The mutual inductance between a primary ...

The mutual inductance between a primary and secondary circuit is `0.5H`. The resistance of the primary and the secondary circuits are `20 ohms` and `5ohms` respectvely. To genrate a current of `0.4A` in the secondary,current in the primary must be changed at the rate of

A

4.0 A/s

B

16.0 A/s

C

1.6 A/s

D

8.0 A/s

Text Solution

Verified by Experts

The correct Answer is:
A
`M=0.5H,R_(P)=20Omega,R_(S)=5Omega`
`e_(2)=M(di_(1))/dtrArri_(2)R_(2)=M(di_(1))/dtrArr(di_(1))/dt=(0.4xx5)/0.5`
`rArr(di_(1))/dt=4A//sec`.
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