Question

a 25ohm resistor connected in series with a coil of 500ohm resistance and 150mH inductance. What is the power factor of the circuit? NOTE: since not given, assume a standard electrical frequency of 60Hz.
https://www.wikihow.com/Calculate-Power-Factor-Correction
Power factor = Cosine of the phase angle.

Tan A = WL/R = (6.28*60)*0.15/(25+500) = 0.110771.
A = 6.15o.

Pf = Cos 6.15 = 0.994.


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