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The current passing through a choke coil...

The current passing through a choke coil of `5` hery is decreasing at the rate of `2 ampere//sec`. The e.mf. Devlopeing across the coil is

A

`10V`

B

`-10V`

C

`2.5V`

D

`-2.5V`

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The correct Answer is:
A
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