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An alternating voltage (E) varies with t...

An alternating voltage (E) varies with time (t) in a circuit which is given by `E=200sin(100pit-(pi)/20)` volt. The R.M.S value of the voltage is

A

`200/1.414` volt

B

200 (1.414) volt

C

200 volt

D

`200sqrt(1.414)` volt

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