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欧姆定律(Ohm's law)是电学基本定律之一,是指同一导体中,通过导体的电流与导体两端的电压成正比,与导体的电阻成反比。由德国物理学家格奥尔格·欧姆(G. Ohm)于1827年提出。它说明了电流和电压与电阻之间的关系。
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