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In an a.c circuit, V & I are given by V ...

In an a.c circuit, `V` & I are given by `V = 100 sin (100 t)` volt.
`I = 100 sin (100 t + (pi)/(2)) mA`
The power dissipated in the circuit is:

A

`10^(4)` watt

B

10 watt

C

2.5 watt

D

5 watt

Text Solution

Verified by Experts

The correct Answer is:
C
`P = V_(rms) I_(rms) cos phi = (100)/( sqrt(2)) * (100)/( sqrt(2)) cos ((pi)/( 3)) xx (10 ^(-3))`
` = (10^(4))/( 2) xx (1)/(2) xx 10 ^(-3) = 2.5 ` watt
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