Introduction to the use of resistors
Resistor is commonly referred to as a resistor. It is a current limiting element. After the electrical resistance is in the circuit, the resistance of the resistor is fixed. The resistor is common is two pins, which can limit the current size of the branches. The ideal resistor is linear, that is, the transient current passing through the resistor is proportional to the external transient voltage.
The end voltage and current have a positive function relationship, and the exhibit electrical energy is converted into two-terminal devices that can be used in other ways, represented by the letter R, the unit is ohmic (Ω). The resistance value of the resistance element is normal and temperature, data, length, and cross-sectional area. The weight of the weighing electrical resistance is a temperature coefficient, which is defined as a percentage of resistance values ??in the temperature of 1 ° C per liter.
The main physical characteristics of the resistor are thermal energy, which can also be said to be a energy consuming component, and the current produces heat. The resistor usually sends a partial pressure and shunt in the circuit. For signals, the AC and DC signals can pass the resistance. Resistors’ Extendation and Application Resistors Classification Individually discerned in accordance with the resistance value.
The impedance resistor cannot be changed. The resistance variable is called a potentiometer or variable resistor. According to the nature discrimination: the linear resistance (ohmic resistance), and the characteristics satisfy the ohm law. Nonlinear resistance, not satisfied with Ohm’s law. In accordance with resistor material identification, the common mainly is the following: wire wind resistor: universal wire wind resistor, fine wire wind resistor, high power wire wind resistor, high frequency wire wind resistor