103年關務電機機械 - 考試
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By Connor
at 2018-03-04T19:16
at 2018-03-04T19:16
Table of Contents
https://imgur.com/a/aj7PK
想請問第三題的容量S
為何可以直接120*20
電流不會因為頻率變動而改嗎?
我的想法是
V=IR
V有改,同一變壓器R應該沒變
那I應該也會變
還請高手解惑
感謝!!
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