中学物理电学实验中常用到电源,在不同的实验中对电源的要求不同,如交、直流电源,不同电动势的电源,内阻不同的电源,中学实验室常配备的有干电池、蓄电池和学生电源等.有些实验限于条件的特殊性而对电源有特殊要求,实验时常用电源和电阻或其他元器件(如电子元件)组合以构成满足 Electrical power is commonly used in middle school physics experiments. Different requirements are placed on the power supply in different experiments, such as AC and DC power supplies, different electromotive force power supplies, and power supplies with different internal resistances. The labs in middle schools are equipped with dry batteries, batteries, and student power supplies. Etc. Some experiments are limited to the special conditions of the conditions and have special requirements for the power supply. In the experiment, the power supply and resistors or other components (such as electronic components) are commonly used to form a composition.