Question

Write one function of variable resistance or rheostat

Answer 1

Types of rheostats

Rheostats are of two types:

Rotary rheostats

Linear rheostats

Rotary rheostats

Rotary rheostat is also sometimes referred as circular rheostat because its resistive element looks like a circle. The resistive element of the rotary rheostat is circular or angled. In these types of resistors, the wiper or slider moves in a rotary manner. Rotary rheostats are used in most of the applications than the linear rheostats because their size is smaller than the linear rheostats.

Linear rheostats

Linear rheostat is also sometimes referred as cylindrical rheostat because its resistive element looks like a cylinder. In these types of resistors, the wiper or slider moves in a linear manner. Linear rheostats are used in laboratories of doing research and teaching.