RESISTORS OVERVIEW - what is resistor ? - what are the types of resistors ? - what are the material used in resistors making ?

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                Resistors

Resistors are electronic elements that are used to limit the amount of current or voltage in a voltage.



In general resistors classified as fixed resistors and variable resistors, which resistors values remain fixed at a constant value are known as fixed resistors. Variable resistors are classified into rheostats and potentiometers, which resistors are used in circuits where we want current and voltage to be controlled or regulated.


FIXED RESISTORS

Wire wound resistors

Wire wound resistors are consists of a former made up of an insulating material like ceramic or plastic. The former in cylindrical or rectangular in shape. These resistors are available from 0.001Ω to several tens of kilo ohm. 
             
              They can be used in high temperature situations but very large in size and weight. They are capable of carrying extremely large currents but some situations wire can break, leading to the breakdown of the circuit. These type of resistors very costly.

Carbon resistors





  These resistors are made of carbon which are acts as a conductor. The two type of resistors available one is carbon film resistors and another one is carbon composition resistors. 
        
     Thin film resistors are manufacture by depositing a thin film of carbon on a ceramic substrate. Thick films greater than 5μm in thickness. Thick films are manufacture by gold, platinum and palladium.

    Carbon composition resistors two basic types one is slug type and another one is glass filament type.  this type of resistors made by carbon granules mixed with organic binder and molded into a pellet shape.
         
     Carbon film resistors are available in miniature size and good high frequency. But they are vulnerable to mechanical shocks and chemically reactive.



                              VARIABLE RESISTORS


Rheostats 

     Usually variable resistors used in circuits where we want current and voltage to controlled or regulated. Rheostats can handle small and large power alike. They have large current carrying capacity. But these resistors values greater than about 10 kΩ,  they are costly, bulky and large weight.





Potentiometers

   Potentiometers are also variable resistances. They are made carbon or wire. Potentiometers are smaller than rheostats. Carbon resistors available from MΩ. Wire wounds are available up to 100 kΩ. These are limited by large tolerance values.

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RESISTORS OVERVIEW - what is resistor ? - what are the types of resistors ? - what are the material used in resistors making ? RESISTORS OVERVIEW - what is resistor ? - what are the types of resistors ? - what are the material used in resistors making ? Reviewed by knowledge people creators on January 13, 2019 Rating: 5
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