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 dropped through a vertical copperff9-kbq j s70h pipe sli3jfkd+ na, x53 66reyox6fbttghtly larger than the magnet. Relative to the speed it would fall in aidnfx5r3 3aof6 k,t66e+t b jxyr, the magnet in the pipe falls:
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
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