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dodge_viper 2017-5-29 09:39 PM

Electromagnetism

有條問題想請教。我覺得係b,但點解答案係a?

iixmm 2017-5-30 04:13 PM

Use right hand rule for the e-m field surrounding each of the wires.

If A, the e-m waves between the two wires will cancel each other, causing them  to attract each other.
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