In a circular conducting coil, when curr...

In a circular conducting coil, when current increases from `2A` to `18A` in `0.05` sec., the induced e.m.f. is `20V`. The self-inductance of the coil is

A

`62.5 mH`

B

`6.25 mH`

C

`50 mH`

D

None of these

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The correct Answer is:

A

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