Power: a Series Circuit Consists of a 50-Hz Ac Source

question 16

Multiple Choice

Power: A series circuit consists of a 50-Hz ac source, a 40-Ω resistor, a 0.30-H inductor, and a 60-μF capacitor. The rms current in the circuit is measured to be 1.6 A. What is the power factor of the circuit?

• A) 0.70
• B) 0.66
• C) 0.63
• D) 0.59
• E) 0.56

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