Colorado Cosmetology Written Practice Exam

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What type of electrical current is commonly used in most household hair styling appliances?

Alternating current (AC)
Direct current (DC)
Galvanic current
Tesla high-frequency current

The correct answer is: Alternating current (AC)

The correct answer is that alternating current (AC) is commonly used in most household hair styling appliances. This type of current is what powers standard electrical outlets in homes, making it readily accessible for everyday use. Most hair dryers, curling irons, and straighteners are designed to operate efficiently with AC, as it allows appliances to run at higher voltages and power levels necessary for effective hairstyling. Direct current (DC), while used in some battery-operated devices, is less common in household appliances that require plugging into a wall outlet. Galvanic current is typically used for specific skin treatments rather than for styling hair. Tesla high-frequency current is mainly applied in specialized treatments in salons rather than in typical home appliances. Therefore, alternating current is the standard in most household hair styling tools.