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In an AC circuit , underset(o)(V) , unde...

In an AC circuit , `underset(o)(V)` , `underset(o)(I)` and cos`theta` are voltage amplitude , current amplitude and power factor respectively, the power consumption is

A

1/2`underset(o)(V)``underset(o)(I)` cos`theta`

B

`(1/sqrt(2)) V_(0)I_(0)costheta`

C

`V_(0)I_(0)costheta`

D

`(1/sqrt(2))V_(0)I_(0)sintheta`

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The correct Answer is:
A
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