Alternating current

A sinusoidal alternating voltage.

1 = peak, also amplitude,
2 = peak-to-peak,

3 = effective value,

4 = Period

A sine wave, over one cycle (360°). The dashed line represents the root mean square (RMS) value at about 0.707

Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.

单词	Alternating Current Power
释义	Alternating Current Power 英语百科 Alternating current Alternating current (AC), is an electric current in which the flow of electric charge periodically reverses direction, whereas in direct current (DC, also dc), the flow of electric charge is only in one direction. The abbreviations AC and DC are often used to mean simply alternating and direct, as when they modify current or voltage.
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Alternating Current Power

Alternating current