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

How to find the acceleration of a body , How to find the acceleration of a ...

How to find the acceleration of a body in a non inertial frame on the action of friction? Solution) Use the concept of pseudo force. Multiply  the mass of the body of which you

Invention for that shockley-brattain-bardeen won nobel prize, Shockley, Bra...

Shockley, Brattain and Bardeen won a Nobel Prize for what small invention? Ans: Shockley, Bardeen and Brattain won a Nobel Prize for small invention of transistor.

Work, a loaded cart has a mass of 227kg. if a 312n force acting at an angl...

a loaded cart has a mass of 227kg. if a 312n force acting at an angle of 30degree to the ground is applied. how much work is done in moving the cart 15meters?

Determine the relation between exposures, 1. Consider two monoenergetic pho...

1. Consider two monoenergetic photon beams with the same photon fluences. In one beam the photons are 100 keV and in the other they are 1 MeV. Determine the most appropriate relati

Subset [tabular method], 1.A=the set of whole numbers less tan 4 ? 2.B=the ...

1.A=the set of whole numbers less tan 4 ? 2.B=the set of prime numbers less than 19 ? 3.C=the set of first three days of week?

Define perfectly plastic body , An object which does not get its actual con...

An object which does not get its actual configuration at all on the removal of deforming force, though short the deforming force can be is a perfectly plastic body.

Gyroscopes, GYROSCOPES: PRINCIPLES Gyroscopes are rotating masses ...

GYROSCOPES: PRINCIPLES Gyroscopes are rotating masses (usually cylindrical in form) which are deliberately employed because of the particular properties which they demonst

Moment of inertia, Moment of Inertia In this section we get formulae for...

Moment of Inertia In this section we get formulae for determining the moment of inertia or second moment of a mass around an axis for several common physical shapes. The mome

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