The back e.m.f. induced in a coil, when ...

The back e.m.f. induced in a coil, when current change from `1` ampere to zero in one millisecond , is `"4 volts"`, the self-inductance of the coil is

A

1H

B

4H

C

`10^(-3)H`

D

`4 xx 10^(-3) H`

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The correct Answer is:

D

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