本题目来源于试卷: Electromagnetic Induction and Faraday’s Law and Lenz Law，类别为 美国物理杯赛(Physics Bowl)
[单选题]
94.20: A magnet is dasrcmn ha09b akm)ya q46od15+w 4-ofrzmm 1-+txxy) 07s 4/ih 4q o1vz3k lqwgqfmfp7opped through a vertical copper pipe slightly larger than the magnet. Relative to the speed it would fall in air, the magnet in the pipe fvxfmpmk tzs)4lfx/1wo371- ih q+m 0yq zq4g7alls:
A. more slowly because it is attracted by the innate magnetic field of the pipe
B. more slowly because the currents induced in the pipe produce an opposing magnetic field.
C. at the same rate.
D. more quickly because it is attracted by the innate magnetic field of the pipe.
E. more quickly because the currents induced in the pipe produce a opposing magnetic field.
参考答案: B
本题详细解析:
暂无
| 
