本题目来源于试卷: Physics Unit17: Electric Potential，类别为 通用国际物理
[单选题]
A 5.0-nC charge is atjc9l;3fvj f,ki4hpu 5 (0 vj . 8waeqkc3uumu8wm*g:)7* h rx+ -8cosgur, 0) and a -2.0-nC charge is at (3.0 m, 0). If the potential is taken to be zero at infinity, whusu-gmcre +8) .gwu j *8xu7q:owh3a8kr cv *mat is the electric potential energy of a 1.0-nC charge at point (0, 4.0 m)?
A. $1.5 \times 10^{-8} \; J$
B. $3.6 \times 10^{-9} \; J$
C. $1.1 \times 10^{-8} \; J$
D. $7.7 \times 10^{-9} \; J$
参考答案: D
本题详细解析:
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