What is the structure of sliding rheostat?

The structure of a sliding rheostat generally includes five parts: terminals, sliders, resistance wires, metal rods and porcelain cylinders. The sliding rheostat is an important component in the circuit. It changes its position by moving the position of the slider. Resistor, thus playing the role of protecting the circuit and controlling the circuit.

#The operating environment of this article: Windows 7 system, Dell G3 computer.

1. Structure and Principle

Sliding rheostat is an important component in the circuit. It changes its own resistance by moving the position of the slider. , thus playing the role of protecting the circuit and controlling the circuit. The sliding rheostat generally consists of five parts: terminal, slider, resistance wire, metal rod and porcelain cylinder. In circuit analysis, the sliding rheostat can be used as either a fixed value resistor or a variable value resistor. The resistance wire of the sliding varistor is generally a nickel-chromium alloy with high melting point and high resistance. The metal rod is generally a metal with low resistance. Therefore, when the resistance cross-sectional area is constant, the longer the resistance wire, the greater the resistance, and the shorter the resistance wire, the resistance. The smaller.

2. Main functions:

(1) Protect the circuit.

(2) Change the magnitude and direction of the current in the circuit by changing the resistance of the part connected to the circuit, thereby changing the voltage at both ends of the conductor (electrical appliance) connected in series with it. When connecting the sliding rheostat, the requirement is: "one up, one down, focus on the bottom". Use one binding post each for the metal rod and the resistance wire; for the actual connection, the two binding posts for the resistance wire should be selected according to the requirements.

(3) Change the voltage. When exploring Ohm's law (I=U/R), it plays the role of changing the voltage across the electrical appliances connected in series with it.

If you want to learn more about programming, please pay attention to the php training column!

The above is the detailed content of What is the structure of sliding rheostat?. For more information, please follow other related articles on the PHP Chinese website!