What electrical current uses a back-and-forth movement of electrons in a conductor?
A) AC
B) DC
C) EC
D) PC
Answer: A
Explanation: A) Correct. AC uses a back-and-forth movement of electrons in a conductor.
B) Incorrect. DC results in a direct flow of electrons through a conductor.
C) Incorrect. AC uses a back-and-forth movement of electrons in a conductor.
D) Incorrect. AC uses a back-and-forth movement of electrons in a conductor.
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