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A coil of inductance 8.4 mH and resistan...

A coil of inductance `8.4 mH` and resistance `6` `Omega` is connected to a `12 V` battery. The current in the coil is `1.0 A` at approximately the time.

A

`500`sec

B

`20` sec

C

`35` millisec

D

`1` millisec

Text Solution

Verified by Experts

The correct Answer is:
D
Peak current in the circuits `i_(0)(12)/(6)=2A`
Current decreases from `2A` to `1A` i.e., becomes half in time `t=0.693(L)/(R )=0.693xx(8.4xx10^(-3))/(6)=1` milli sec.
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