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A series combination of R,LC is connecte...

A series combination of `R,LC` is connected to an a.c source. If the resistance is `3 Omega` and the reactance is `4 Omega`, the power factor of the circuit is

A

0.4

B

0.6

C

0.8

D

`1.0`

Text Solution

Verified by Experts

The correct Answer is:
B
`x = 4 Omega, R = 3 Omega`
`Z = sqrt(R^(2) + X^(2)) = sqrt(3^(2) + 4^(2)) = 5`
Power factor `= cos phi = (R )/(Z) = (3)/(5) = 0.6`
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