West Virginia Barber Written Practice Exam 2025 – Complete Study Resource

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What is an electrical current that switches its flow back and forth in a circuit?

Ac (Alternating current)

An electrical current that switches its flow back and forth in a circuit is called Alternating Current (AC). AC is the type of electrical current commonly used in households and businesses because it can easily be converted to different voltages and is more efficient for long-distance power transmission compared to Direct Current (DC).

Direct Current (DC) flows continuously in one direction and is commonly used in batteries and electronic devices. Ground Fault Interrupters (GFI) are devices meant to protect against electrical shock by quickly cutting off power in the event of a ground fault. Ohm is a unit of electrical resistance.

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Dc (Direct current)

GFI (Ground Fault Interrupters)

Ohm

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