Unlike DC power, in AC power, the voltage and current are __________ changing.

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Multiple Choice

Unlike DC power, in AC power, the voltage and current are __________ changing.

Explanation:
In alternating current, the voltage and current continuously vary with time, usually following a sinusoidal pattern at the supply frequency (like 60 Hz in many places). This time-varying nature is what sets AC apart from DC, where the voltage and current stay essentially constant. The way they relate to each other depends on the load: for a resistor they rise and fall together (in phase), while inductors and capacitors can shift this relationship, but the core idea is that the values are always changing rather than fixed.

In alternating current, the voltage and current continuously vary with time, usually following a sinusoidal pattern at the supply frequency (like 60 Hz in many places). This time-varying nature is what sets AC apart from DC, where the voltage and current stay essentially constant. The way they relate to each other depends on the load: for a resistor they rise and fall together (in phase), while inductors and capacitors can shift this relationship, but the core idea is that the values are always changing rather than fixed.

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