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When the current changes from +2A to -2A...

When the current changes from `+2A` to `-2A` in `0.05s`, and emf of `8B` is induced in a coil. The coefficient of self-induction of the coil is

A

0.2 H

B

0.4 H

C

0.8 H

D

0.1 H

Text Solution

Verified by Experts

The correct Answer is:
D
Induced emf, `e=-(L)/(di)/(dt)=-L(-2-2)/(0.05)`
`8=L((4))/(0.05)implies L=(8xx0.05)/(4)=0.1H`
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