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

The mass of an atom is constituted mainly by, The mass of an atom is consti...

The mass of an atom is constituted mainly by: (1) Neutron and neutrino                 (2) Neutron and electron    (3) Neutron and proton         (4) Proton and electr

What is the order of the ring, Q. In Newton's ring experiment, the diameter...

Q. In Newton's ring experiment, the diameter of certain order of dark ring is measured to be double that of  the second ring. What is the order of the ring? Data :

I need help, Please help me identify a physics based reason for why it may ...

Please help me identify a physics based reason for why it may be advantageous to have a less than average person as a jockey in a horse race.

Advantages and disadvantages of three phase system, Advantages and disadvan...

Advantages and disadvantages of three phase system over single phase System A) In a single phase circuit the power delivered is pulsating. In three phase system the total power

State polarization of the incident light, The light passing through a quart...

The light passing through a quarter wave plate is analysed by a rotating Nicol prism. It is get that the intensity of the emergent light beam from the rotating Nicol prism becomes

Farad, farad; F (after M. Faraday, 1791-1867) The derived SI unit of c...

farad; F (after M. Faraday, 1791-1867) The derived SI unit of capacitance, described as the capacitance into a capacitor that, if charged to 1 C, contain a potential differenc

Explain the self inductance of the coil, A silicon iron ring is wound with ...

A silicon iron ring is wound with 800 turns, the ring having a mean diameter of 120mm and a cross-sectional area of 400mm 2 . If when carrying a current of 0.5 A the relative p

Estimate the amount of heat removed, A cooling drum consists of a (horizont...

A cooling drum consists of a (horizontally) rotating, large stainless steel cylinder. The cylinder has a diameter D and a width of W. The cooling at the inside of the drum is so ef

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