Variable resistor, Physics

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

 

 

 

Posted Date: 7/9/2012 5:14:13 AM | Location : United States







Related Discussions:- Variable resistor, Assignment Help, Ask Question on Variable resistor, Get Answer, Expert's Help, Variable resistor Discussions

Write discussion on Variable resistor
Your posts are moderated
Related Questions
Unit of Capacity: The unit of capacity of a capacitor is known as farad (f). It is given by a relation. q = cv.

is average speed the magnitude of average velocity?justify your answer with a suitable example?

As defined in physics, work is: a) A scalar quantity b) Always a positive quantity c) A vector quantity d) Always zero Ans: As defined in physics, work

can I get ready made project for wave optic?

There are six properties of surface tension:- Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Explain quasi-static isothermal expansion A method is reversible only if it is quasi-static and non dissipative.   E.g. A quasi-static isothermal expansion of an ideal gas


Consider the 4-f system below where an object is placed at the input plane and is illuminated by a plane wave  With the object from part a) inserted in the input plane, a m

what is absorber paper in a dry cell

Q. How is a galvanometer converted into (a) an ammeter and (b) a voltmeter? A galvanometer is transformed into an ammeter by connecting a low resistance in parallel with it. Th