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The current in a LR circuit builds up to...

The current in a LR circuit builds up to `(3)/(4)th` of its steady state value in 4s . The time constant of this circuit is

A

`(1)/(ln 2)s`

B

`(2)/(ln 2)s`

C

`(3)/(ln 2)s`

D

`(4)/(ln 2)s`

Text Solution

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The correct Answer is:
B
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