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An inductor coil stores U energy when i ...

An inductor coil stores U energy when i` current is passed through it and dissipates energy at the rate of P. The time constant of the circuit, when this coil is connected across a battery of zero internal resistance is

A

`(4U)/(P)`

B

`(U)/(P)`

C

`(2U)/(P)`

D

`(2P)/(U)`

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The correct Answer is:
C
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