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

Find the angular velocity of rotation, A mass m rotating freely in a horizo...

A mass m rotating freely in a horizontal circle of radius 1 m on a frictionless smooth table supports a stationary mass 2m, attached to the other end of the string passing through

How to make a simple pulley, How to make a simple pulley A reasonably s...

How to make a simple pulley A reasonably satisfactory pulley can be complete from a wire clothes hanger and a cotton reel. Cut off both wires of the hanger at a distance of abo

What are the disadvantages of polymer fibers optics, What are the disadvant...

What are the disadvantages of polymer fibers optics? The ends of polymer fibers can't operate along with high temperatures. Illuminators or light sources are required with a sc

What is applied force, Applied Force (Fapp) : an applied force is a force t...

Applied Force (Fapp) : an applied force is a force that is useful to an object by a person or another object. If a person is approaching a desk across the room, there is applied fo

Describe the type of analysis , Suppose that a colleague comes to you for h...

Suppose that a colleague comes to you for help prior to conducting an experiment with two treatments to determine the effects on the density (weight) of cornbread.  The recipe for

Special resistor materials: tungsten, Tungsten: Atomic numb...

Tungsten: Atomic number 74 Symbol W Atomic weight 183.85 Discovery Purified Tungste

What is pyrometer, A thermocouple is used to calculates very high (2000 0 C...

A thermocouple is used to calculates very high (2000 0 C) as well as very low (- 200 0 C) temperature in industries and laboratories. The thermocouple used to measure very high tem

Waves, a wave of eqn y=0.005sin(8x-3t).find displacement when x=0.3 t=20s?i...

a wave of eqn y=0.005sin(8x-3t).find displacement when x=0.3 t=20s?in the answer given y=0.005sin(80*3-0.3*20)= y=0.005sin(-36+12pi).what is this 12pi?

Determine the temperature of the concorde''s skin in flight, The supersonic...

The supersonic airliner Concorde is 62.1 m long when sitting on the ground on a typical(15degreesC) day. It is primarily made of aluminum. In flight at twice the speed of sound, fr

Explain crohn disease, Explain Crohn disease Crohn's disease:  a chro...

Explain Crohn disease Crohn's disease:  a chronic, recurrent disease characterized by patchy inflammation of any portion of digestive tract from  the mouth to anus.

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