基本電學 - 考試
By Leila
at 2013-04-06T18:46
at 2013-04-06T18:46
Table of Contents
(C)
有一交流電壓為v(t)=100sin(377t)V,若以伏特計量測時
,其指示應為幾伏特?
(A)141.4V (B)100V (C)70.7V (D)50V。
http://ppt.cc/KzsL
答案是0伏
我想請問為什麼伏特計在正旋式下是用有效值,
可是在電壓波形圖下是用平均值,還是伏特計有
差別嗎?
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