The circuit in which current and voltage are in phase, the power factor is:
Correct answer: C. One
- A. Double
- B. three times
- C. One
- D. Zero
Explanation
A power factor of 1 indicates that the voltage and current are in phase and have a low-harmonic content. A power factor of 0 indicates that the voltage and current are 90-degrees out of phase.
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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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