New Jersey State Board Esthetics Practice Exam

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Prepare for the New Jersey State Board Esthetics Exam with a comprehensive set of flashcards and multiple-choice questions. Each question includes hints and explanations. Get fully equipped for your esthetics licensure!

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What type of current does a generator create when it alternates?

Direct current
High frequency current
Induced current
Alternating current

The correct answer is: Alternating current

A generator produces alternating current (AC) by creating a flow of electric charge that periodically reverses direction. This switching of direction occurs due to the design of the generator, which typically includes components like coils of wire rotating within a magnetic field. As these coils move, the magnetic field induces an electric current that fluctuates in both polarity and magnitude, producing the characteristic waveform of AC. In practical applications, alternating current is the most widely used form of electricity for power distribution and is suitable for long-distance transmission because it can be easily stepped up or down in voltage using transformers. This property of AC allows it to be transmitted efficiently over large distances, making it essential for residential and commercial power systems. The other types of current mentioned serve different functions: direct current (DC) flows consistently in a single direction, while high frequency current relates to specific applications like radio frequencies and does not describe what occurs in typical power generation. Induced current refers to the current that is generated as a result of a changing magnetic field, but this term is more descriptive of the mechanism rather than the type of current produced by a generator.