輸配電學電阻值 - 考試
By James
at 2013-04-11T10:05
at 2013-04-11T10:05
Table of Contents
http://www.fotopu.com/image/347130
紅色圈起來地方看不懂
http://www.fotopu.com/image/338205
這是課本詳解,不懂之處是在於截面積A部分,
還是要直接背=> 一圓密爾0.5067*10^-3次方
還有後面單位mm^2 <<<這是平方公尺嗎?
m不是10^-3(10的負3次方嗎),why變成-6了呢???
--
紅色圈起來地方看不懂
http://www.fotopu.com/image/338205
這是課本詳解,不懂之處是在於截面積A部分,
還是要直接背=> 一圓密爾0.5067*10^-3次方
還有後面單位mm^2 <<<這是平方公尺嗎?
m不是10^-3(10的負3次方嗎),why變成-6了呢???
--
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考試
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