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

Calculate the fiber volume fraction, An engineer is using DSC to determine ...

An engineer is using DSC to determine the fiber volume fraction of a carbon fiber / epoxy prepreg. It is known that the heat of reaction of the pure, fresh epoxy resin (no carbon

Determine dielectric constant of vacuum, Dielectric constant of vacuum is ...

Dielectric constant of vacuum is (A) Infinity. (B) 100. (C) One. (D) Zero. Ans: Dielectric constant of vacuum is one.

Difference between an electron and a beta ray, What is the essential diffe...

What is the essential difference between an electron and a beta ray? The electron of nuclear origin is known as a beta-particle. There is otherwise no difference among an elec

Electrostatics, in a uniform electric field, the potential is 10v at the or...

in a uniform electric field, the potential is 10v at the origin and 8v at each of the points (1,0,0),(0,1,0) and (0,0,1).Find the potential at the point (1,1,1).

State boyle''s law , "At base temperature the volume of a gas differs inver...

"At base temperature the volume of a gas differs inversely with pressure". If P and V are volume and pressure of a gas at a given temperature then

Why the rain dropes are spherical in shape? , This is due to the surface te...

This is due to the surface tension of water. Because of the surface tension , the drop tends to have minimum possible surface area, and the shape which is possible with  minimum su

Kinematics, for small values of theta sine theta is equal to tan theta . ho...

for small values of theta sine theta is equal to tan theta . how?

Illustrate briefly the significance of entropy, Illustrate briefly the sign...

Illustrate briefly the significance of entropy? Determine the work done when 2 mole of an ideal gas expands isothermally and reversible from 10 atm. To 2 atm. Pressure at 27 0 C

Explain point charge - electric field, What are the magnitude and the sign ...

What are the magnitude and the sign of a point charge that experiences a force of   0.48 N east when placed in an electric   field of 1.6 x 10 5 N/C west? Normal 0

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