[問題] 洛仁茲力
請問各位高手
此題用洛仁茲力右手定則如何判斷?
http://i.imgur.com/wG4w0xf.jpg

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推
06/04 13:47, , 1F
06/04 13:47, 1F
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06/04 19:16, , 2F
06/04 19:16, 2F
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06/04 19:16, , 3F
06/04 19:16, 3F
推
06/04 21:00, , 4F
06/04 21:00, 4F
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06/04 21:36, , 5F
06/04 21:36, 5F
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06/04 21:36, , 6F
06/04 21:36, 6F
推
06/07 15:46, , 7F
06/07 15:46, 7F