A sinusoidal A.C. current flows through ...

A sinusoidal A.C. current flows through a resistor of resistance `10Omega`. If the peak current is 2 A flowing through the resistor then the power dissipated in ………W.

A

30

B

20

C

10

D

40

Verified by Experts

The correct Answer is:

B

Average power dissipated = `ltI^(2)(t)Rgt`
`= lt I_(0)^(2)R sin^(2)(omegat)gt`
`= I_(0)^(2)R lt sin^(2)(omegat)gt`
`= 4 xx 10 xx 1//2`
`= 20 "watt"`

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