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The circuit is switched on at t=0, Find ...

The circuit is switched on at `t=0`, Find the time when energy stored in inductor becomes `1/n` tiimes of maximum energy stored in it:

A

`(L)/(R )ln((sqrtn-1)/(sqrtn))`

B

`(L)/(R )ln((sqrtn+1)/(sqrtn-1))`

C

`(L)/(R )ln((sqrtn)/(sqrt(n+1)))`

D

`(L)/(R ) ln ((sqrtn)/(sqrtn-1))`

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