在电路中,滑动变阻器常与一些定值电阻搭配连接在一起,用来改变电路中的总电阻,控制电路中的电流和电压变化。按照连接方式,其基本搭配连接方式有串联、并联和分压式。一、串联串联搭配连接方式有两种。方式一如图1所示,设定值电阻的阻值为R0,滑动变阻器的总电阻为R。当滑片P位于a端时,M、N间的总电阻最小,电阻为R0;当滑动头P位于b端时,M、N间的总电阻最大,电阻为(R+R0),因此,M、N间的总电阻变化范围为R0~ In the circuit, sliding rheostat often associated with some of the value of the resistor connected together, used to change the total resistance in the circuit to control the current and voltage changes in the circuit. In accordance with the connection, the basic connection with a series connection, parallel and partial pressure. First, the tandem connection with the connection in two ways. As shown in Figure 1, the resistance of the set resistor is R0, and the total resistance of the rheostat is R. When the slider P is located at end a, the total resistance between M and N is the smallest, and the resistance is R0. When the slider P is located at end b, the total resistance between M and N is the largest and the resistance is (R + R0) The total resistance between M and N ranges from R0 ~