The power factor of resonant series circuit is:
Correct answer: A. 1
- A. 1
- B. 0
- C. -1
- D. 0.5
Explanation
This is the correct answer. In a resonant series circuit, the power factor is equal to 1, which represents a perfect or unity power factor. This occurs because, at the resonant frequency, the inductive reactance and capacitive reactance cancel each other out, resulting in a net impedance that is purely resistive. As a result, the current and voltage are in phase, and there is no phase difference between them. This leads to a power factor of 1, indicating that all the power is real and is used to do useful work.P=VI cosθ Cosθ is called the power factor. Power is max when cosθ = 1
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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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