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A group of electric lamps having a total...

A group of electric lamps having a total power rating of `1000` watt is supplied by an `AC` voltage `E=200sin(310t+60^(@))`. Then the r.m.s value of the circuit current is

A

0.41666666666667

B

`5sqrt(2)`A

C

20 A

D

`10sqrt(2)`A

Text Solution

Verified by Experts

The correct Answer is:
B
`P=V_(rms)I_(rms) = V_(0)/sqrt(2)I_(rms)`
`therefore I_(rms) = (1000sqrt(2))/(200) = 5sqrt(2)`
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