台電養成班第19題答案有錯!!! - 考試
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By Ula
at 2013-06-24T22:43
at 2013-06-24T22:43
Table of Contents
※ 引述《leewefep (過客甲)》之銘言:
: [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
: 今年台電養成班的電子學考題第19題的答案為A,可是把A帶進去,根本不可能
: 因為電阻就有3.5K(Rc+Re),怎麼算都不可能有7.8mA,因為Vcc只有18V
: 我有看錯嗎???
你沒有看錯~
此題答案A.B.C.D沒有一個正確答案
依照不才來看~這題可以去申訴看看
原因是
此題已達到"飽合條件"
就算已飽和條件計算
Let Vce = 0.2 V
在依照節點下去分析 可得VE = 5.4875
則 VC = 5.6875
IcQ = 4.925 (mA)......這才是正解!
--
: [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
: 今年台電養成班的電子學考題第19題的答案為A,可是把A帶進去,根本不可能
: 因為電阻就有3.5K(Rc+Re),怎麼算都不可能有7.8mA,因為Vcc只有18V
: 我有看錯嗎???
你沒有看錯~
此題答案A.B.C.D沒有一個正確答案
依照不才來看~這題可以去申訴看看
原因是
此題已達到"飽合條件"
就算已飽和條件計算
Let Vce = 0.2 V
在依照節點下去分析 可得VE = 5.4875
則 VC = 5.6875
IcQ = 4.925 (mA)......這才是正解!
--
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考試
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By Necoo
at 2013-06-27T20:18
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at 2013-06-29T11:10
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at 2013-07-06T18:06
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