Resistors are one of the most common electronic components used in circuits to limit the flow of current. They come in various shapes and sizes, but the most common type is the mainstream resistor diagram model. These models have some key differences that set them apart from each other. In this article, we will explore the differences between mainstream resistor diagram models and how they are used in electronic circuits.
Fixed resistors are the most basic type of resistor and have a fixed resistance value that does not change. They are typically used to limit the flow of current in a circuit and are available in various resistance values. Fixed resistors are represented in circuit diagrams by a zigzag line with a resistance value indicated next to it.
Variable resistors, on the other hand, have a resistance value that can be adjusted manually. They are often used to control the voltage or current in a circuit and are commonly found in volume controls, dimmer switches, and tuning circuits. Variable resistors are represented in circuit diagrams by a zigzag line with an arrow pointing to a movable contact.
Potentiometers are a type of variable resistor that have three terminals – two fixed terminals and one movable terminal. They are used to divide a voltage or control the volume in electronic circuits. Potentiometers are represented in circuit diagrams by a zigzag line with an arrow pointing to a movable contact and two fixed terminals.
One of the key differences between these mainstream resistor diagram models is their resistance values. Fixed resistors have a fixed resistance value that does not change, while variable resistors and potentiometers have adjustable resistance values. This allows for more flexibility in controlling the flow of current in a circuit.
Another difference between these models is their physical construction. Fixed resistors are typically small, cylindrical components with two leads, while variable resistors and potentiometers are larger components with a knob or slider for adjusting the resistance value.
In terms of applications, fixed resistors are commonly used in circuits where a specific resistance value is required, such as voltage dividers and current limiting circuits. Variable resistors and potentiometers are used in circuits where the resistance value needs to be adjusted, such as volume controls and tuning circuits.
Overall, the differences between mainstream resistor diagram models lie in their resistance values, physical construction, and applications. Understanding these differences can help electronics enthusiasts and engineers choose the right type of resistor for their circuits. Whether it's a fixed resistor, variable resistor, or potentiometer, each model has its own unique characteristics that make it suitable for specific applications in electronic circuits.
