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]
97.17:Two bar magnets r-(6p ml/ -j;ivui cmbyei e/1hvt u*h v,un88are to be cut in half along the dotted lines shown. None of t ,n 8huvvtu*8hhe pieces are rotated. After the cut:
A. None of the halves will attract any other.
B. The two halves of each magnet will attract each other.
C. The two halves of each magnet will repel each other.
D. The two halves of the top magnet will repel, the two halves of the bottom magnet will attract.
E. The two halves of the top magnet will attract, the two halves of the bottom magnet will repel.
参考答案: E
本题详细解析:
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