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A coil of inductance 8.4mH and resistanc...

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

A

500 s

B

20 s

C

35 ms

D

1 ms

Text Solution

Verified by Experts

The correct Answer is:
D
`I-(V)/( R) (1-e^((RT)/(L)))= (12)/(6) [1-e^((6l)/(8.4xx10^(3)))]=1`
`implies t = 0.97 xx10^(-3)1` milli -sec
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