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15 Aug 2009 21:36:44 IST

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Please solve, In a decaying L-R circuit, the time after which energy stored in the inductor reduces

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Please solve, In a decaying L-R circuit, the time after which energy stored in the inductor reduces to one forth of its initial value is?

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VARUN RAJ

Blazing goIITian

Joined: 16 Mar 2008

Posts: 1825

15 Aug 2009 22:29:14 IST

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energy at time t=0

1/2Li² and at time t=t enrgy is 1/4*1/2Li² therefore i2=1/2

1/2=ie^-tR/L

solving it we get the answer

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