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

Define the physical significance of damping coefficient, Define the physica...

Define the physical significance of damping coefficient and how can we caluclate it? What is its unit

Magnet, i need to demonstrate the magnetic properties as a part of my assig...

i need to demonstrate the magnetic properties as a part of my assignment. then how can i do that?

Static Electricity, True or False 1)Clothes always get static cling when d...

True or False 1)Clothes always get static cling when dried in a clothes dryer 2) Dust stick to all charged objects 3) Static Electricity always stays in one place and never move

What is the mass maximum displacement from equilibrium, An 8 kilogram mass ...

An 8 kilogram mass resting on a frictionless horizontal surface is attached to a spring with a force constant of 50 Newtons per meter.  If the velocity of the mass by the equi

Compare the resistances, Two resistances have lengths in the ratio 1:4 and ...

Two resistances have lengths in the ratio 1:4 and radius 1:2,specific resistances in ratio 3:1. compare their resistances. Solution) Given lengths l1=1                          l

Additive nature of charge, An object contains n1 protons and n2 electrons.w...

An object contains n1 protons and n2 electrons.what is net charge on the object?

Free body diagram, illustrate the situation. the child is on the slide

illustrate the situation. the child is on the slide

Why capacitor blocks d.c. but allows a.c., Q. A capacitor blocks d.c. but a...

Q. A capacitor blocks d.c. but allows a.c. Why? Capacitive reactance   XC = 1/ω C        = 1 / 2πν C Where ν is the frequency of the a.c. supply. In a d.c. circuit

Explain about the heat extraction, Explain about the Heat Extraction? ...

Explain about the Heat Extraction? a) A body of mass M has a temperature-independent precise heat C. If the body is heated reversibly from a temperature T i to a temperature

Explain sliding versus static friction, Sliding versus Static Friction: ...

Sliding versus Static Friction: Friction force is the force exert by a surface as an object moves crosswise it or makes an effort to move across it. Two types of friction force

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