pf:
=>)
庫倫定律： V=IR(伏特=安培x歐姆)，
兩邊同乘A
=> AV=AIR
(<=
AV=AIR
兩邊同除A得
V=IR
故，庫倫定律<=>色即是空 ，得證！#
以上，搏君一笑！哈！
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