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The inductance of a coil in which a curr...

The inductance of a coil in which a current of 0.1A increasing at the rate of 0.5 `As^-1`. Represents a power flow of `1/2 W` is,

A

2H

B

8H

C

20H

D

10H

Text Solution

Verified by Experts

The correct Answer is:
D
`U=1/2 Li^2`
`therefore (dU)/(dt)= 1/2 L.2I (dI)/(dt)`
`therefore D- LI (dl)/(dt)`
`therefore L=P/(I (dI)/(dt))=((1/2))/(0.1 times 0.5)=10H`
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