ARRL Technician Practice Exam

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Prepare for the ARRL Technician Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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What is the name for a current that reverses direction on a regular basis?

Direct current
Alternating current
Pulsating current
Reactive current

The correct answer is: Alternating current

Alternating current, commonly known as AC, is characterized by its ability to reverse direction periodically. This switching of direction occurs at a specified frequency, which is typically measured in hertz (Hz). In contrast to direct current (DC), where the flow of electric charge is in a constant direction, alternating current varies its direction and amplitude, making it more suitable for transmitting electricity over long distances. This property of alternating current allows for the efficient operation of electrical appliances and motors that are designed to utilize this type of current, which is why it is the standard form of electricity delivered to homes and businesses. Understanding alternating current is essential for anyone studying electronics, as it lays the groundwork for more complex concepts in electrical engineering and physics.