Alternating voltage is:
Correct answer: D. Varies sinusoidally with time
- A. Varies inversely with time
- B. Varies directly with time
- C. Independent of time
- D. Varies sinusoidally with time
Explanation
The correct option, "Varies sinusoidally with time," describes alternating voltage in AC circuits accurately, indicating that voltage oscillates between positive and negative values following a sinusoidal waveform pattern over time.
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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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