Question

what is use of the rheostat in circuit write it's symbol​

Answer 1

Answer:

Rheostat is generally used in the applications where high voltage or current is required. Rheostats are used in dim lights to change the intensity of light. If we increase the resistance of the rheostat, the flow of electric current through the light bulb decreases. As a result, the light brightness decreases.

Answer 2

Answer:

 Difference between Rheostat and a Potentiometer

Rheostat Potentiometer

A rheostat being able to handle higher current and voltage is mostly used in electrical application like motor control, light control A potentiometer is mostly used in electronic applications like electronic regulators, reference setters, etc.