某用电器俩端的电压是4.5V,工作电流是200mA,5min内消耗电能多少焦耳
某用电器俩端的电压是4.5V,工作电流是200mA,5min内消耗电能多少焦耳
物理人气:122 ℃时间:2019-12-13 23:50:39
优质解答
W=UIt=4.5*(200/1000)*(5*60)=270焦耳
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