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 e ,fp g0;v:owwcarry currents of 5.0 A and 8.0 A in the oppositv zq:2j0xozmh3 +ja*b k3+; zfcpz;ph e direction. The wires are separated by 0.30 m. Find the magnetic force per unit length ap: zkm*f c32hhp ;q +zv+joj30zz; bxbetween the two wires.
A. $2.7 \times 10^{-5} \; N$ repulsive
B. $7.2 \times 10^{-5} \; N$ repulsive
C. $2.7 \times 10^{-5} \; N$ attractive
D. $7.2 \times 10^{-5} \; N$ attractive
参考答案: A
本题详细解析:
暂无
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