Colorado Esthetician Written Practice Exam

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Alternating current is best described as?

Constant, even flowing current that travels in one direction only
Flow of electricity along a conductor in a complete circuit
How much electric energy is being used in 1 second
Rapid and interrupted current, flowing in one direction then in the opposite direction

The correct answer is: Rapid and interrupted current, flowing in one direction then in the opposite direction

Alternating current is best described as a rapid and interrupted current that flows first in one direction and then in the opposite direction. This characteristic distinguishes alternating current from direct current, which flows constantly in one direction only. Option A describes direct current, option B is a general description of electrical flow, and option C relates to the measurement of electric energy consumption in a specific timeframe, not the nature of the current flow itself.