Explain the concept of rheostat. - Vidyadip

Question

Explain the concept of rheostat.

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Answer

A rheostat is an adjustable resistor used in applications that require adjustment of current or resistance in an electric circuit.
The rheostat can be used to adjust potential difference between two points in a circuit, change the intensity of lights and control the speed of motors, etc.
Its resistive element can be a metal wire or a ribbon, carbon films or a conducting liquid, depending upon the application.
In hi-fi equipment, rheostats are used for volume control.

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