SAT Subject Physics Practice Question 77: Answer and Explanation

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Question: 77

4. Negative charges are accelerated by electric fields toward points

A. at lower electric potential
B. at higher electric potential
C. where the electric field is zero
D. where the electric field is weaker
E. where the electric field is stronger

Correct Answer: B


4 B Use the definition ∆V = –. If an electric field accelerates a negative charge doing positive work on it, then WE > 0. If q < 0, then – is positive. Therefore, ∆V is positive, which implies that V increases.

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