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When the current in a coil charges from ...

When the current in a coil charges from 2A to 4A in 0.05 s, emf of 8 volt is induced in the coil. The coefficient of self induction of the coil is -

A

0.1 henry

B

0.2 henry

C

0.4 henry

D

0.8 henry

Text Solution

Verified by Experts

The correct Answer is:
B
`epsilon = M(di)/(dt)` or `8=M[((4-2))/(0.05)]`
`therefore M =(8xx0.05)/(2)=0.2` henry
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