Variable resistor, Physics

Assignment Help:

The variable resistor is a resistor whose value can be accustomed by turn a shaft or sliding a control. They are also referred to as potentiometers or rheostats and permit the resistance of the device to be altered by hand. A rheostat is a variable resistor with two terminals, one sliding and one fixed. It is utilized with high currents. The term rheostat is usually reversed for higher-powdered device, above about ½ watt. A potentiometer is a common type of variable resistor; one common use is as volume controls on audio amplifiers and other forms of amplifiers.

CLASSIFICATIONOF VARIABLE RESISTORS:

These resistors can be categorized on the basis of material used and application. On the basis of application they are known as the general purpose and they are of precision type. But on the basis of resistive material they are categorized as:

(a)          Carbon composition resistors

(b)         Wire wound resistors

(c)           Cermets resistors

(d)         Multi-turn resistors

(e)         Multi-turn potentiometers

 

 

 


Related Discussions:- Variable resistor

Explain selection of motors, Selection of motors for different Engg. applic...

Selection of motors for different Engg. application 1.  For Cement industry: Various types of motors for pumps, fans, conveyors ,crushers, kilns an mills Major mill

How does a cat land on its feet, How Does a Cat Land on its Feet? The s...

How Does a Cat Land on its Feet? The saying is in which cats always land on their feet. This animation describes how they do this.

What instrument is utilized to measure volume, Q. What instrument is utiliz...

Q. What instrument is utilized to measure volume? Answer:- Liquid volume is measured with graduated cylinders, beakers, measuring cups, spoons and the like. For regular ob

Illustrate the newton s laws of motion, Q. Illustrate the Newton s laws of ...

Q. Illustrate the Newton s laws of motion? Answer:- 1. A body at rest will stay at rest and one in motion will remain in motion until and unless acted upon by an external

Scintillation counter, working principle of alpha,beta and gamma scintillat...

working principle of alpha,beta and gamma scintillation counter

Traingle law, derive the triangle law of vector

derive the triangle law of vector

Top of a tower a stone, From top of a tower a stone is thrown up and it rea...

From top of a tower a stone is thrown up and it reaches the ground in time t1. A second stone is thrown down with the same speed and it reaches the ground in t2. A third stone is r

Energy of a body in simple harmonic motion, In general the total energy of ...

In general the total energy of a harmonic oscillator having of two parts,  potential energy (P.E) and kinetic energy (K.E.), the former being because of its displacement from the m

Hardness, what is the unit of hardness?

what is the unit of hardness?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd