RL電路中有電源的算法 - 考試

By Hedy
at 2017-04-19T22:13
at 2017-04-19T22:13
Table of Contents
http://imgur.com/nXYf9ib
請問這題開關打開後,電路中還有一個電壓源,算是充電還是放電呀?
那假如是放電,且不照他的解答而用i(t)=E/R*e^-1去回推VL,
那麼i(t)=40/25*e^-1
Vr1=24e^-1
Vr2=16e^-1
-VL=40-(24e^-1)-(16e^-1)=-40(1-e^-1)
放電電路中多一個電源,總覺得哪裡怪怪的?
--
請問這題開關打開後,電路中還有一個電壓源,算是充電還是放電呀?
那假如是放電,且不照他的解答而用i(t)=E/R*e^-1去回推VL,
那麼i(t)=40/25*e^-1
Vr1=24e^-1
Vr2=16e^-1
-VL=40-(24e^-1)-(16e^-1)=-40(1-e^-1)
放電電路中多一個電源,總覺得哪裡怪怪的?
--
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考試
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