多個基本電學考古題疑問 - 國營工作討論
By Dorothy
at 2018-12-13T15:59
at 2018-12-13T15:59
Table of Contents
請教多個基本電學考古題疑問.麻煩高手能解答一下.
Q1.http://tinyurl.com/ybsvc4v6
這題我知道要用密爾門定理解,但是詳解中算式直接忽略與電流源串連的兩個電阻.
我的問題是為何能忽略?
Q2.http://tinyurl.com/y9328tnh
這題我只有第一小題有問題,題目要求a.b兩點的諾頓等效電路.我是將R1跟E=24V
電壓源拆成R1並聯0.2A電流源,諾頓電流就是ab短路之電流 0.2+0.18-0.56 = -0.18
諾頓電阻為R//R2//R3=120//280//168=56歐姆,但是詳解的跟我完全不一樣.所以是
它寫錯還是我算錯.
Q2.詳解http://tinyurl.com/yc44htst
Q3.http://tinyurl.com/ybsjulmo
這題抱歉我其他算式有點多,我是要問第35題:某公司負載為600kVA,原功率因數為0.6
,若想將功率因數提高至0.8,則應並聯電容器之虛功率為多少kVAR?
我的問題不是計算,而是題目中負載為600kVA這句話,
通常這表示功率P是600kVA不是嗎?
我知道VA是視功率的的單位.但是正常說負載都是說它的功率P(watt)吧,
如果今天題目變為某公司負載視功率為600kW,那我應該怎麼寫?
有人get到我說的點嗎?
簡單來說,
負載為600kW
負載為600kVA
負載為600kVAR
三句話只是單位不同,但是計算就會不一樣.
我的問題是這是題目題意不清還是我小題大作?
--
Q1.http://tinyurl.com/ybsvc4v6
這題我知道要用密爾門定理解,但是詳解中算式直接忽略與電流源串連的兩個電阻.
我的問題是為何能忽略?
Q2.http://tinyurl.com/y9328tnh
這題我只有第一小題有問題,題目要求a.b兩點的諾頓等效電路.我是將R1跟E=24V
電壓源拆成R1並聯0.2A電流源,諾頓電流就是ab短路之電流 0.2+0.18-0.56 = -0.18
諾頓電阻為R//R2//R3=120//280//168=56歐姆,但是詳解的跟我完全不一樣.所以是
它寫錯還是我算錯.
Q2.詳解http://tinyurl.com/yc44htst
Q3.http://tinyurl.com/ybsjulmo
這題抱歉我其他算式有點多,我是要問第35題:某公司負載為600kVA,原功率因數為0.6
,若想將功率因數提高至0.8,則應並聯電容器之虛功率為多少kVAR?
我的問題不是計算,而是題目中負載為600kVA這句話,
通常這表示功率P是600kVA不是嗎?
我知道VA是視功率的的單位.但是正常說負載都是說它的功率P(watt)吧,
如果今天題目變為某公司負載視功率為600kW,那我應該怎麼寫?
有人get到我說的點嗎?
簡單來說,
負載為600kW
負載為600kVA
負載為600kVAR
三句話只是單位不同,但是計算就會不一樣.
我的問題是這是題目題意不清還是我小題大作?
--
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