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5v2.1a是多少w
更新时间: 2022-01-07 09:06:18  

10.5w。计算公式如下:电压x电流=功率。5x2.1=10.5。瓦特是国际单位制的功率单位。瓦特的定义是1焦耳1秒,即每秒转换、使用或耗散的以焦耳为量度的能量的速率。在电学单位制中,是伏特乘安培乘功率因数1V.A,简称1伏安。

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