Question

What is the power factor for the circuit shown?

Answer 1

Power factor $\cos \varphi =\frac{R}{Z}=\frac{60}{\sqrt{{60}^2+{(X_L-X_C)}^2}}=\frac{60}{\sqrt{{60}^2+{(100-20)}^2}}=\frac{60}{100}=\frac{3}{5}$