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Simple Definitions

The most important electronics terms, demystified in one place.

Alternating Current

Our Take

Current that regularly changes direction due to an alternative positive and negative voltage. Typically refers to the type of current you get from the wall and sometimes but not usually used when referring to RF or other high-frequency waveforms.

Book Definition

A current that varies sinusoidally with time.

Fundamentals of Electric Circuits, 5th Edition by Charles K. Alexander and Matthew N. O. Sadiku

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