Does alternating current (AC) change its polarity 60 times per second when the frequency is 60 hertz?

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Multiple Choice

Does alternating current (AC) change its polarity 60 times per second when the frequency is 60 hertz?

Explanation:
The key idea is that frequency counts full cycles per second, and each cycle includes a reversal of polarity twice. A 60 Hz AC waveform completes 60 cycles every second, and within each cycle the voltage goes from positive to negative and back to positive. That means polarity flips twice per cycle: 60 cycles × 2 flips per cycle = 120 polarity changes per second. So AC does not change polarity 60 times per second; it changes 120 times per second. The statement is false.

The key idea is that frequency counts full cycles per second, and each cycle includes a reversal of polarity twice. A 60 Hz AC waveform completes 60 cycles every second, and within each cycle the voltage goes from positive to negative and back to positive. That means polarity flips twice per cycle: 60 cycles × 2 flips per cycle = 120 polarity changes per second. So AC does not change polarity 60 times per second; it changes 120 times per second. The statement is false.

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