基本電學-交流電有效值 - 考試
By John
at 2014-05-18T20:57
at 2014-05-18T20:57
Table of Contents
Q:i(t)=10+20sin(ωt+30°)+30sin(2ωt+60°)A，則i(t)的有效值為?
A:25.9A
想法，有效值為均方根植，所以用√(10^2+(20/√2)^2+(30/√2)^2)=√750=27.38
跟答案不一樣，所以到底哪裡有問題?請知道地告知一下，多謝。
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A:25.9A
想法，有效值為均方根植，所以用√(10^2+(20/√2)^2+(30/√2)^2)=√750=27.38
跟答案不一樣，所以到底哪裡有問題?請知道地告知一下，多謝。
--
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By Vanessa
at 2014-05-19T05:25
at 2014-05-19T05:25
By Ina
at 2014-05-21T13:25
at 2014-05-21T13:25
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