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.
