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In the inductive circuit given in the fi...

In the inductive circuit given in the figure, the current rises after the switch is closed. At instant when the current is 15 mA, then potential difference across the inductor will be-

A

Zero

B

240V

C

180V

D

60V

Text Solution

Verified by Experts

The correct Answer is:
C
At any instant
`240 = iR + L (di)/(dt)`
`rArr 240 = 15 xx 10^(-3) xx 4000 + L (di)/(dt)`
`rArr L (di)/(dt) = 240 - 60 = 180 V `
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