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If a rate of change of current of 4 As^(...

If a rate of change of current of 4 `As^(-1)` induces an emf of 20 mV in a solenoid, the self inductance of the solenoid is

A

3 mH

B

4 mH

C

5 mH

D

6 mH

Text Solution

Verified by Experts

The correct Answer is:
C
`e=(dI)/(dt)`
`20xx10^(-3)=Lxx4`
`L=5mH`
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