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The power factor of the following circui...

The power factor of the following circuit will be:

A

0.2

B

0.4

C

0.6

D

0.8

Text Solution

Verified by Experts

The correct Answer is:
D
`Z = sqrt(R^(2) + (X_(L)-X_( c))^(2))`
`rArr Z = sqrt((40 + 40)^(2) + (100 - 40)^(2)) = 100 Omega`
`rArr cos phi = R/Z = 80/100 = 0.8`
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