The current in a coil of inductance 5H d...

The current in a coil of inductance `5H` decreases at the rate of `2A//a`. The induced e.m.f. is

A

`2 V`

B

`5 V`

C

`10 V`

D

`-10 V`

Text Solution

Verified by Experts

The correct Answer is:

C

`e=-L(di)/(dt)`,since current decrease so`(di)/(dt)`isnegative, hence `e=-5(-2)=+10V`

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