Question

what is rheostat? please explain with elaboration​

Answer 1

Answer:

A rheostat is a variable resistor, or an adjustable resistance; placing it in any circuit allows you to control the resistance - and by extension, the current itself! Sometimes, a variable resistor or rheostat is referred to as a potentiometer and used interchangeably in day-to-day language.

Answer 2

A᭄nswer:−

A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.

The measuring instrument called a potentiometer is essentially a voltage divider used for measuring electric potential (voltage); the component is an implementation of the same principle, hence its name.

Potentiometers are commonly used to control electrical devices such as volume controls on audio equipment. Potentiometers operated by a mechanism can be used as position transducers, for example, in a joystick. Potentiometers are rarely used to directly control significant power (more than a watt), since the power dissipated in the potentiometer would be comparable to the power in the controlled load.

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