Function For Variable Resistor

December 09, 2019

Definition of variable resistor. Variable resistors are mostly used for device calibration.

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Solved In Fig A Resistor 3 Is A Variable Resistor And T

Variable Resistor

Electronically controlled variable resistors exist which can be controlled electronically instead of by mechanical action.

Function for variable resistor. A variable resistor is in essence an electro mechanical transducer and normally works by sliding a contact wiper over a resistive element. A variable resistor is a device that is used to change the resistance according to our needs in an electronic circuit. It is applied in an electronic circuit for adjusting circuit resistance to control voltage or current of that circuit or part of that circuit.

It is an electronic component. Mostly they are used as a three terminal device. The function of variable resistor is to provide variable resistances in circuitary its also do the function of providing different values of current to different components.

Another type of variable resistor is called a potentiometer or a pot. When a variable resistor is used as a potential divider by using 3 terminals it is called a potentiometer. The electrical resistance is varied by sliding a wiper contact along a resistance track.

Variable resistors can be used to adjust circuit elements such as a volume control or a lamp dimmer or as sensing devices for heat light humidity force or chemical activity. The function of variable resistor is to provide variable resistances in circuitary its also do the function of providing different values of current to different components. Fixed resistors have resistances that only change slightly with temperature time or operating voltage.

When only two terminals are used it functions as a variable resistance and is called a rheostat. Pots are usually small and work by having their resistance control adjusted once and fixed often with a screwdriver. It can be used as a three terminal as well as a two terminal device.

A variable resistor is used because a potential divider with 3 terminals is known as a potentiometer. Pots are used as voltage dividers. Basically the function of a resistor is always to oppose the flow of current through it and the strength of this opposition is termed as its resistance.

It consists of a bare fixed resistance conductor with a terminal at each end plus a conductive wiper arm that moves along the fixed resistor to provide different resistance values. A variable resistor is an electro mechanical transducer that generally works by sliding a contact wiper over a resistive element. German physicist sir gs.

Ohms was able to discover a definite relationship between voltage current and resistance. Two common types of special resistors include light dependent resistors which change resistance as light levels change. A variable resistor is a resistor in which the electric resistance value is adjustable.

A variable resistor is called a potentiometer or pot for short.