最大功率觀念 - 考試
By James
at 2014-12-03T20:51
at 2014-12-03T20:51
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
http://ppt.cc/207P
此題是101年電子工程基本電學大意39題
因為要求最大功率,第一個想法是想先算出等效電阻
1.設電流源開路,所以Rth=12//(3+9)=6 歐姆
Rth=3+9+12=24 歐姆(解答這樣寫和我完全不一樣)
Eth看解答是8A*9=72V (這裡我就不曉得為何要這樣算)
最大定理公式=72/4*24=54
請求大大給些觀念謝謝!!!
--
http://ppt.cc/207P
此題是101年電子工程基本電學大意39題
因為要求最大功率,第一個想法是想先算出等效電阻
1.設電流源開路,所以Rth=12//(3+9)=6 歐姆
Rth=3+9+12=24 歐姆(解答這樣寫和我完全不一樣)
Eth看解答是8A*9=72V (這裡我就不曉得為何要這樣算)
最大定理公式=72/4*24=54
請求大大給些觀念謝謝!!!
--
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考試
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at 2014-12-05T14:25
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