本题目来源于试卷: Physics Unit20: Magnetism，类别为 通用国际物理
[单选题]
Two long parallel wires carry equal currents. (n9ay :6 lboooThe magnitude of t 02wlycub q,h:j+x y7.f.etl dhe force between the wires is F. The current in each wire is now doubled. What is the magnitude of the new force betwe.fqy t+ewy 7 xcl2.lhd ,:buj0en the two wires?
A. $4 \; F$
B. $2 \; F$
C. $F/4$
D. $F/2$
参考答案: A
本题详细解析:
暂无
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