Question

What is variable resistance ? Explain with real life example.

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Answer 1

A variable resistor is the most significant component found in many electrical devices for controlling the tone, bass as well as volume. This is due to the fact that resistors can be connected together with the other components to form filters for a desired level. They can also be used in computer monitors for color or positioning as well as dimming or switching lamps. This is achieved through digital to analog and analog to digital circuits; one additional advantage is that the knob can be turned instead of typing a value every time you want to change the tint or brightness.

Simply put, a variable resistor is able to have its electrical resistance adjusted. These devices are used when working with electrical circuitry because they help to control voltage and/or currents. They specifically work with voltage and currents that are a part of the circuit.

The different types of variable resistors include:

Potentiometer.
Rheostat.
Thermistor.
Magneto resistor.
Photoresistor.
Humistor.
Force sensitive resistor.