The average value of alternating voltage over a complete cycle is:
Correct answer: A. Zero
- A. Zero
- B. 0.7Vmax
- C. 0.707Vmax
- D. None of these
Explanation
The correct option is "zero." For a sinusoidal waveform, which is common in AC circuits, the average value of alternating voltage over a complete cycle is zero because the positive and negative portions of the waveform cancel each other out when averaged.
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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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