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9. Which of the following is true regarding current in an external circuit?

A. A direct current constantly switches direction of flow to match the change of charge at each terminal.
B. Direct current always moves from the positively charged terminal to the negatively charged terminal.
C. Alternating current always moves from the positively charged terminal to the negatively charged terminal.
D. The flow of an alternating current switches direction when a generator's terminals change its charge.

Respuesta :

The statement that best describes an external circuit is "D. The flow of an alternating current switches direction when a generator's terminals change its charge." The main difference between direct and alternating current is the direction of flow. Direct current follows only one direction from negatve to positive, while alternating current changes direction periodically.

Answer: D. The flow of an alternating current switches direction when a generator's terminals change its charge.

Explanation: I JUST TOOK THE PF EXAM AND GOT IT CORRECT!!!

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