滑动变阻器是初中物理电学中重要的电路器件之一,有着改变电路中电流大小,控制、调节用电器两端电压的作用,在电学实验中应用较为广泛。因此学习滑动变阻器的使用方法,正确分析 Slide rheostat is one of the important circuit devices in physics of junior middle school physics. It has the function of changing the current in the circuit, controlling and regulating the voltage across the electrical appliance, and is widely used in electrical experiments. Therefore, learning the use of sliding rheostat, the correct analysis