SAT Subject Physics Practice Question 582: Answer and Explanation

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Question: 582

8. The electron-volt (eV) is a unit of

A. power.
B. voltage.
C. current.
D. potential.
E. energy.

Correct Answer: E


The correct answer is (E). The electron carries a negative charge of 1.6 × 10-19C, which is a tiny amount of energy. The electron volt is the energy required to move 1 electron through an electric potential of 1 volt.

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