Contents
How do you identify a variable resistor?
The variable resistor is represented by a zig-zag line and an arrow across (or above) it, like that shown in the figure below.
Which is the example of variable resistor?
Some examples of variable resistors are the volume control knob on a radio and a dimmer switch used for a light. Rheostats and potentiometers are two common types of these devices. Variable resistors have two basic components.
What does a variable resistor symbol look like?
A variable resistor also called an adjustable resistor, consists of two terminals, where one of the terminals is a sliding or moving contact often known as a wiper. The variable resistor IEC symbol is represented by a rectangular box and an arrow across (or above) it, like that shown in the figure below.
What is variable resistor used for?
Variable resistor A resistor limits the passage of electrical current. A fixed resistor has a resistance that does not change. The resistance of this resistor is changed by moving the position of a slider. A variable resistor is used in some dimmer switches and volume controls.
What devices use a variable resistor?
Applications of Variable Resistors
- Audio control.
- Television.
- Motion control.
- Transducers.
- Computation.
- Home Electrical Appliances.
- Oscillators.
What is a variable resistor called?
A variable resistor is a resistor of which the electric resistance value can be adjusted. These resistors are called digital potentiometers.
What is a variable resistor and how does it work?
A variable resistor works by adjusting the path that current has to flow. The dial you turn will move another piece of wire inside the resistor. The end result is that the electricity will travel through a certain length of the strip depending on where you turn the knob.
What does the variable resistor do in a circuit?
Definition of Variable Resistor. It is an electronic component . It is applied in an electronic circuit for adjusting circuit resistance to control voltage or current of that circuit or part of that circuit. The electrical resistance is varied by sliding a wiper contact along a resistance track.
Does a variable resistor have have a fixed resistance?
The variable resistors are the one which offers variable value of resistance. Thus, it is also known as an adjustable resistor. Variable resistor has three leads, in which two leads are fixed, and one is movable. Thus, through with this movable lead the value of the resistance varies.
What is another common name for variable resistor?
Variable resistors, or as they are often called potentiometers are used in many areas of electronics. They are used for volume and gain controls as well as a variety of other applications.
What are the units of a resistor?
The unit ohm is the S.I unit of the resistor. there are other units of resistance like kΩ, MΩ . Ohm’s law gives that the resistance of the resistor is equal to voltage/current which means the unit of resistance is volt (V)/ampere (A) and it is called Ohm (Ω).