基本電學 戴維寧等效電壓疑問? - 考試
By Mason
at 2020-03-10T19:54
at 2020-03-10T19:54
Table of Contents
如圖所示
https://imgur.com/2LMockl
想問為什麼
左邊的等效電壓 可以直接用分壓下去算Va Vb出來..
右邊的等效電壓如果用同樣分壓卻不能算
試了很多次好像必須要設Va Vb未知 下方接地用節點把未知兩點求出來才正確..
想問的是為什麼一個可以直接分壓 一個不行..
目前遇到的題型好像只有求中間的電流才能單純用分壓去算兩點電壓..
有高手知道差異在哪裡嗎?
--
https://imgur.com/2LMockl
想問為什麼
左邊的等效電壓 可以直接用分壓下去算Va Vb出來..
右邊的等效電壓如果用同樣分壓卻不能算
試了很多次好像必須要設Va Vb未知 下方接地用節點把未知兩點求出來才正確..
想問的是為什麼一個可以直接分壓 一個不行..
目前遇到的題型好像只有求中間的電流才能單純用分壓去算兩點電壓..
有高手知道差異在哪裡嗎?
--
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