Power factor is defined by:
Correct answer: A. cos θ
- A. cos θ
- B. sin θ
- C. tan θ
- D. sec θ
Explanation
The power factor is defined by the cosine of the angle between the voltage and current waveforms in an AC circuit. Therefore, the correct option is 1. cos θ.
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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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