In a series RL circuit, R = 30 Ω and \(X_L\) = 40 Ω. The power factor of the circuit is
A. 0.5
B. 0.8
C. 0.75
D. 0.6
1 answer
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Answer: D. 0.6
\(Z=\sqrt{30^2+40^2}=50\ \Omega\), \(\cos\phi=\frac{R}{Z}=0.6\).
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· 23 Oct 2026
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