基本電學 問題 - 考試
By Linda
at 2013-12-07T16:48
at 2013-12-07T16:48
Table of Contents
[考題] 國考歷屆考題與考題觀念討論(書裡看到的選這個)請附上想法、出處
問題:http://ppt.cc/Or5b
開關在啟斷很久後於時間t=0時閉合,求Vc(0+)?(+號是在0的右上角)
答案是20V
想法:閉合瞬間,電容視為短路,不是應該是0V嗎@@?還是我搞錯Vc(0+)的意思了...?
另外,還想請問一下+號在0的右上角與右下角的差別是?
麻煩各位高手解答,謝謝!
--
問題:http://ppt.cc/Or5b
開關在啟斷很久後於時間t=0時閉合,求Vc(0+)?(+號是在0的右上角)
答案是20V
想法:閉合瞬間,電容視為短路,不是應該是0V嗎@@?還是我搞錯Vc(0+)的意思了...?
另外,還想請問一下+號在0的右上角與右下角的差別是?
麻煩各位高手解答,謝謝!
--
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考試
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