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What is the standard frequency of alternating current () supplied to households in the United States of America?
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31. Alternating Current
Alternating Voltages and Currents
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In an alternating current (AC) circuit, what does the frequency of the current represent?
A
The maximum (peak) value of the current, measured in amperes (A)
B
The average value of the current over one full cycle, measured in amperes (A)
C
The number of complete cycles of the current per second, measured in hertz (Hz)
D
The opposition to current due to resistance only, measured in ohms ()
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Understand that in an alternating current (AC) circuit, the current changes direction and magnitude periodically over time.
Recognize that the frequency of the current refers to how often these cycles repeat each second.
Recall that one complete cycle consists of the current going through a full sequence of increasing, decreasing, reversing, and returning to its initial state.
Know that frequency is measured in hertz (Hz), where 1 Hz equals one complete cycle per second.
Therefore, the frequency represents the number of complete cycles of the current per second, not the peak value, average value, or resistance.
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