对电工学中有关交变电路学习的一些难点,如交流电的有效值,电感、电容对交变电流的作用,感应电动机的工作原理及输电等进行了阐述。

• This paper expounds some difficult points in learning the alternating current of electrical engineering such as the effective value of AC,the functions of electrical inductance and capacitance on AC,the working principle of induction-motor and the transmit electricity.