本题目来源于试卷: magnet and magnetic field lines，类别为 美国物理杯赛(Physics Bowl)
[单选题]
04.31: Two very long current-carrying wires are sh ia-pv busf)1cfimqoxx 73;tgl8 s m5p;*f) m73d0zdl ada+2v own end on in the figure below. za d+vad 320ldThe wire on
the left has a 4A current going into of the plane of the paper and the wire on the right has a 3A
current coming out of the paper. Disregarding the case of x → ±∞, in which region(s) could the
magnetic field from these two wires add to zero on the x-axis.
A. Region I only.
B. Region II only.
C. Region III only
D. Regions I & III only
E. In none of the regions
参考答案: C
本题详细解析:
暂无
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