Question

一台电动机电线圈的电阻是1欧,接在220伏的电源上,电动机消耗的功率是4.4W

Answer 1

(1):I=P/U=4.4/220=0.02A

(2):W=4.4*3600=

(3):w=0.02*0.02*1*1=麻烦自己算吧