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The power factor (cos φ) depends on.

Correct answer: D. All of the above

  • A. Inductance
  • B. Capacitance
  • C. Resistance
  • D. All of the above

Explanation

The power factor is the cosine of the phase angle φ, where tan(φ) = (XL - Xc)/R. Since the phase angle depends on the values of the resistance (R), inductive reactance (XL), and capacitive reactance (Xc), the power factor is dependent on all three components.

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About Alternating Current

Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.

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