滑动变阻器在电路中用于调控电器和其他电路的电压、电流,滑动变阻器在电路中有三种常见的接法:限流式电路,分压式电路,并联式电路.在这三种电路中,滑动变阻器对电路控制与影响的特点不同.一、限流式电路如图1所示,滑动变阻器 R_0为限流式接法,用电器 R 上的电压调节范围为 R/(R+R_0)U≤U_R≤U,电流调 The sliding rheostat is used in the circuit to regulate the voltage and current of electrical appliances and other circuits. The sliding rheostat has three common connections in the circuit: current limiting circuit, voltage divider circuit, and parallel circuit. Among these three circuits, The sliding rheostat has different characteristics for controlling and influencing the circuit. 1. The current limiting circuit is shown in Fig. 1. The sliding rheostat R_0 is a current limiting connection. The voltage regulation range of the consumer R is R/(R+R_0)U. ≤U_R≤U, current adjustment