【知识要点] 一、电功 卿缪戮释赘班争 用电器在 标有“220 下的功率叫额定功率一只 V’,表示该 若则; 1.电流通过电动机做功时,电能转化为 能;电流通过电灯,灯丝炽热发光时,电能转化 为和能. 2.电流做功的过程,实际上是电能转化为 能量的过程.电流做了多少功,就 有多少电能转 [Knowledge points] 1. The electric power communicator releases the electric appliance under the mark “The power at 220 is called the rated power at a V”, indicating that if it is done; 1. When the electric current works through the motor, the electric energy is converted into energy. When the electric current passes through the lamp and the lamp glows brightly, the electric energy is converted into energy. 2. The process of current doing work is actually a process of converting electric energy into energy. How much work is done by current, how much energy there is