Rheostat

Brand: CL

Model:BXS

Pictures are for reference only.

Sliding rheostat is a kind of adjustable resistor, which should be selected according to the size of the external load and the adjustment requirements. Sliding rheostat is a circuit element, which can change its own resistance to control the circuit. In circuit analysis, sliding rheostat can be used as a fixed resistor or a variable resistor. The structure of sliding rheostat generally includes five parts: terminal, slider, resistance wire, metal rod and porcelain tube. The resistance wire of sliding rheostat is wound on the insulating porcelain tube, and the resistance wire is coated with insulating paint.

Principle
The sliding rheostat is one of the commonly used devices in electricity. Its working principle is to change the resistance by changing the length of the resistance wire connected to the circuit, thereby gradually changing the current in the circuit. The resistance wire of the sliding rheostat is generally a nickel-chromium alloy with a high melting point and high resistance, and the metal rod is generally a metal with low resistance. Therefore, when the cross-sectional area of ​​the resistor is constant, the longer the resistance wire, the greater the resistance, and the shorter the resistance wire, the smaller the resistance.