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A resistance of 20 Omega is connected to...

A resistance of `20 Omega` is connected to a source of an alternating potential `V=220 sin (100 pi t)`. The time taken by the current to change from the peak value to rms value is

A

`0.2 sec`

B

`0.25 sec`

C

`25 xx10^(-3) sec`

D

`2.5 xx10^(-3) sec`

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