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5v2.1a是多少w
5v2.1a是多少w
更新时间:2024-08-23 06:17:16

10.5w。計算公式如下:電壓x電流=功率。5x2.1=10.5。瓦特是國際單位制的功率單位。瓦特的定義是1焦耳1秒,即每秒轉換、使用或耗散的以焦耳為量度的能量的速率。在電學單位制中,是伏特乘安培乘功率因數1V.A,簡稱1伏安。

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