基本電學一題 戴維寧 求解 - 考試
By Emily
at 2013-04-20T19:14
at 2013-04-20T19:14
Table of Contents
有一題關於 電橋 求電流
要用戴維寧的方式求電流
http://i.imgur.com/lsDeWAx.jpg?1
問題如圖
想問的是等效電壓 Eth 為什麼會是那樣算???
@算式中,為什麼會用60V的電壓去乘以 A、B端 開路的那邊的電阻??
@為什麼不是先求出總體電流 I,然後再以 60-Va = Ia * 3 的方式,
分別算出 Va Vb 再相減???
不好意思,這個很基礎的觀念
小弟不太懂
能不能請前輩們幫忙解惑了
謝謝
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