基本電學相關問題 - 考試
By Callum
at 2014-04-23T23:13
at 2014-04-23T23:13
Table of Contents
※ 引述《PaulDirac (保羅.狄拉克)》之銘言:
: 請問此題
: http://ppt.cc/bcM9
: 書上解答是
: 1.p(t)=250-500cos(628t+100度)
: 2.754W
: 3.-250W
: 4.120HZ
: 但是我算出來是下面
: http://ppt.cc/GWWp
: 感覺似乎書上解答錯了!
: 有請高手解答了 3Q!
V=100∠80
I=10∠20
S=0.5VI*=500∠60
P=Re(S)=250∠0
=250 sin(377t)
有點疑問,我不能這樣算p(t)嗎?
--
: 請問此題
: http://ppt.cc/bcM9
: 書上解答是
: 1.p(t)=250-500cos(628t+100度)
: 2.754W
: 3.-250W
: 4.120HZ
: 但是我算出來是下面
: http://ppt.cc/GWWp
: 感覺似乎書上解答錯了!
: 有請高手解答了 3Q!
V=100∠80
I=10∠20
S=0.5VI*=500∠60
P=Re(S)=250∠0
=250 sin(377t)
有點疑問,我不能這樣算p(t)嗎?
--
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考試
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