台電物理的題目求助 - 考試

By Megan
at 2016-06-13T11:52
at 2016-06-13T11:52
Table of Contents
http://i.imgur.com/gbE4FXq.jpg
小弟物理初學者
有關21題
小弟知道v=IR跟R=pL/A
題目有給導線長30cm
但是怎麼沒給截面積呢
求高手指點計算過程
答案是B
--
小弟物理初學者
有關21題
小弟知道v=IR跟R=pL/A
題目有給導線長30cm
但是怎麼沒給截面積呢
求高手指點計算過程
答案是B
--
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考試
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