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導體的電阻通常用字母R表示,電阻的組織是歐姆(ohm),簡稱歐,符號是Ω(希臘字母,音譯成拼音讀作ōu mīga),1Ω=1V/A.比較大的組織有千歐(kΩ)、兆歐(MΩ)(兆=百萬,即100萬).他們的換算關係是:1TΩ=1000G…
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