Physics · Alternating Current
Alternating current (AC) is defined as a current that changes its direction periodically with time, regardless of its waveform. If four different generators produce electromotive forces (EMF) that periodically reverse their polarities over time (such as sinusoidal, square, triangular, or sawtooth waves), which of them can be classified as AC?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1All waveforms that periodically alternate direction✓
- 2Only sinusoidal and sawtooth waves
- 3Only sinusoidal waves
- 4Only sinusoidal and square waves
Correct answer
All waveforms that periodically alternate direction
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