本题目来源于试卷: Physics Unit20: Magnetism，类别为 国际高中通用物理
[单选题]
At double the distance from a long current-carryin 0 lj9xnx6r.giu *7yllv (irh(g wire, the yey2:p9mo t,l0v/p/f oz*2u4pjbi rk x4emi2strength of the magnetic field produced by that wirel4,i 2m2pr* y:foipp/ytm0 k2u/eb xj4e v9o z decreases to
A. 1/8 of its original value.
B. 1/4 of its original value.
C. 1/2 of its original value.
D. none of the given answers
参考答案: C
本题详细解析:
暂无
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