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A uniformly wound long solenoid of induc...

A uniformly wound long solenoid of inductance `L` and resistance `R` is cut into two parts in the ratio `eta:1`, which are then connected in parallel. The combination is then connected to a cell of emf `E`. The time constant of the circuit is

A

`L//R`

B

`L//2R`

C

`2L/R`

D

`L//4R`

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The correct Answer is:
A
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