There is a close relationship between resistance and temperature, which is usually described by the temperature coefficient of resistance (TCR). The following is a detailed explanation of the relationship between resistance and temperature:
The relationship between resistance and temperature
Metal resistance: The resistance of most metals increases with temperature because the collision between free electrons and metal ions inside the metal increases, leading to an increase in resistance. This phenomenon is called positive temperature coefficient (PTC).
Semiconductor resistance: The resistance of a semiconductor decreases with increasing temperature because the increase in temperature leads to an increase in the number of free electrons in the semiconductor, thereby reducing the resistance. This phenomenon is called Negative Temperature Coefficient (NTC).
Thermistor: Thermistor is a special type of resistor whose resistance value significantly changes with temperature, commonly used in temperature measurement and control applications.
Temperature Coefficient of Resistance (TCR)
The Temperature Coefficient of Resistance (TCR) is a parameter that describes the change in resistance value with temperature, typically measured in ppm/° C. Resistors made of different materials have different TCR values. For example, the TCR value of manganese copper alloy is less than 20ppm/° C, while the TCR value of copper is about 3900ppm/° C.
The influence of temperature on the resistance value of resistors
Positive effect: For most metal resistors, an increase in temperature will lead to an increase in resistance value.
Negative impact: For semiconductors and certain special materials, an increase in temperature can lead to a decrease in resistance value.
Understanding the relationship between resistance and temperature is crucial for electronic engineers, as it not only helps improve the accuracy of circuit design, but also ensures stable operation of circuits in complex environments.
What is the relationship between resistance and temperature? The content source reference is as follows:
1. Wide angle physics | Relationship between resistance and temperature
2. What are the factors that affect the resistance value of resistors
3. What is the relationship between the resistance of HDI PCB free sampling resistors and temperature?
4. Detailed explanation of the formula for the change of resistance with temperature: Master the golden rule of the influence of circuit temperature
5. Revealing the Temperature Coefficient of Resistance: Easily Calculate the Relationship between Resistance and Temperature
6. Temperature coefficient of resistance
7. Temperature Coefficient of Resistance - Sogou Encyclopedia
Do you know what is the temperature coefficient of resistance?
