Read Resistance in One Text - Detailed Introduction to Resistance

Resistance is one of the essential components in electronic circuits. In this article, we will provide a detailed analysis of the concept, types, working principles, and how to measure resistance values of resistors, helping everyone to have a comprehensive and in-depth understanding of this fundamental component

Let's define what resistance is. Simply put, resistance refers to the degree to which a substance obstructs the flow of current, measured in ohms. Its main function is to limit the current in the circuit to ensure safe operation and achieve the expected electrical performance

Explore the types of resistors. Common resistors can be divided into three categories: fixed resistors, variable resistors, and special resistors. Fixed resistor refers to a resistor whose resistance value remains fixed and unchanged, such as metal film resistor, carbon film resistor, etc; Variable resistors include potentiometers and dimmers, and their resistance values can be adjusted through physical means; Special resistors such as thermistors and photoresists have resistance values that change with changes in the external environment

Let's learn more about the working principle of resistors. According to Ohm's Law, voltage is equal to current multiplied by resistance (V=IR), indicating that the magnitude of resistance directly affects the strength of current. When the resistance increases, the current passing through it decreases accordingly; On the contrary, when the resistance decreases, the current increases

How to measure the resistance value? Usually, the resistance range of a multimeter can be used for measurement. Connect the two probes of the multimeter to the two ends of the resistor respectively to read the resistance value. When measuring, it is important to ensure that the resistor is not energized to avoid affecting the measurement results

Resistance is an important component for controlling current. By understanding its concept, classification, working principle, and measurement methods, we can better utilize resistance to complete circuit design and troubleshooting. I hope this article can provide everyone with a deeper understanding of 'resistance'