P=1.5*10^5J/5min=1.5*10^5J/(5*60S)=500W
P=220V*5A=1100W
毎小时工作时间=3*5min=900s
3小时内工作时t=3*900s=2700s
电流的功=消耗的电能=Pt=1100*2700=2970000J
P=1.5*10^5J/5min=1.5*10^5J/(5*60S)=500W
P=220V*5A=1100W
毎小时工作时间=3*5min=900s
3小时内工作时t=3*900s=2700s
电流的功=消耗的电能=Pt=1100*2700=2970000J