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]
The magnetic field pdr;q cm3c8(nc xp ,x;vry gb4a;anh k;+y 7im cs .4f,ykqr3f0noduced by a long straight current-carrying wire is
A. proportional to both the current in the wire and the distance from the wire
B. proportional to the current in the wire and inversely proportional to the distance from the wire.
C. inversely proportional to the current in the wire and proportional to the distance from the wire.
D. inversely proportional to both the current in the wire and the distance from the wire.
参考答案: B
本题详细解析:
暂无
| 
