alternating current

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alternating current

An electrician uses a multimeter to check the alternating current in a wall outlet.

Definition
  1. Noun:
    • An electric current that periodically reverses direction: "Alternating current" refers to the flow of electric charge that changes direction back and forth at regular intervals, typically following a sinusoidal (wave-like) pattern.
Usage
  • "Alternating current" is a technical term used in physics and electrical engineering. It is often abbreviated as AC.
  • It is commonly contrasted with direct current (DC), which flows in only one direction.
  • The term is used to describe the type of electricity supplied by power grids to homes and businesses.
Examples
  • Noun:
    • The generator produces alternating current at a frequency of 50 hertz.
    • Most wall outlets supply alternating current, which is why many electronic devices need a power adapter to convert it to direct current.
    • The war of currents in the late 19th century was between proponents of alternating current and direct current for electrical power distribution.
Advanced Usage
  • "AC power": Electrical power delivered in the form of alternating current.
    • The motor is designed to run on standard AC power.
  • "AC voltage": The voltage of an alternating current source, usually given as a root mean square (RMS) value.
    • The AC voltage in this circuit is too high for the component.
Variants and Related Words
  • AC (abbreviation, noun): The common abbreviation for "alternating current".
    • Is this device powered by AC or DC?
  • Alternating (adjective): Occurring in or characterized by alternating turns or changes.
    • The machine uses an alternating magnetic field.
Synonyms
  • AC (noun): The standard abbreviation and direct synonym.
Antonyms
  • Direct current (noun): An electric current that flows in one direction only. Its abbreviation is DC.
alternating current

An electrician uses a multimeter to check the alternating current in a wall outlet.

Noun
  1. an electric current that reverses direction sinusoidally
    • In the US most household current is AC at 60 cycles per second

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