What frequency is standard for North American alternating current?

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Multiple Choice

What frequency is standard for North American alternating current?

Explanation:
North American power systems run at 60 cycles per second, or 60 Hz. This means the voltage completes a full positive-to-negative-to-positive cycle 60 times each second, so the waveform repeats every 1/60 of a second. This frequency is standard across the U.S., Canada, and much of Mexico. The other numbers aren’t the grid’s frequency here: 50 Hz is common in many other regions, while 120 Hz isn’t the supply frequency (it’s the ripple frequency you can observe after rectifying 60 Hz AC), and 100 Hz isn’t used as the standard North American grid frequency.

North American power systems run at 60 cycles per second, or 60 Hz. This means the voltage completes a full positive-to-negative-to-positive cycle 60 times each second, so the waveform repeats every 1/60 of a second. This frequency is standard across the U.S., Canada, and much of Mexico. The other numbers aren’t the grid’s frequency here: 50 Hz is common in many other regions, while 120 Hz isn’t the supply frequency (it’s the ripple frequency you can observe after rectifying 60 Hz AC), and 100 Hz isn’t used as the standard North American grid frequency.

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