標題: ac generator 同 dc generator有咩唔同? [打印本頁]

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作者: keko    時間: 2009-3-17 20:49     標題: ac generator 同 dc generator有咩唔同?

ac係咪會轉current的流動方向?dc就唔會? 點解dc的current永遠都係正?ac就可以正負正負?

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