The valules of resistance and inductive reactance of a choke coil are `8 Omega` and `6 Omega` respectively. What is the power factor of the coil?
The valules of resistance and inductive reactance of a choke coil are `8 Omega` and `6 Omega` respectively. What is the power factor of the coil?
A. A. 0.2
B. B. 0.4
C. C. 0.6
D. D. 0.8
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Correct Answer - D
For an L-R circuit
Power factor `(cos theta) = (R)/(sqrt(R^(2)+L^(2)omega^(2)))`
`8/(sqrt(64+36)) = 8/10 = 0.8`.
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