Damallo

 ::  :: 

      

   ENG&mohamed amr 30 2009, 11:44 am

() (Carbon Resistor). (Wire Resistor)



1-


10% 5%
http://www.qariya.com/colu/resistor_color.htm


R=ρ L/a



( )



ޡ ǡ



1-
. , ˝ ( )


- Wire-wound resistor:
( ) , ˝ 1- 2- .



3- Thermistor :
, .


[size=21]
1-[size=9] (N T C)
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[size=12]Negative Temperature Coefficient[/size]
[size=12] [/size]
[size=12]2- (P T C)[/size]
positive Temperature Coefficient

[size=16] Photoresistor LDR:
Cadmium sulfide , .





[size=21][size=21]: Voltage Dependant resistor
()
Varistor

[url=http://www.qariya.com/electronics/images/Varistor_photo.JPG][url=http://www.qariya.com/electronics/images/Varistor_photo.JPG][/url][/url]

Varistor
Variable resistance ( Varistor Variable resistance) .
:
. ޡ . Spike

:
220 ϡ 400 ( ) 220 400 Spike.


Voltage Dependant Resistor VDR.



ѡ


[url=http://etronics.free.fr/dossiers/images/resis04.gif][url=http://etronics.free.fr/dossiers/images/resis04.gif][/url][/url]
[url=http://www.electvillage.com/up06/up/varistor.jpg][url=http://www.electvillage.com/up06/up/varistor.jpg][/url][/url]
( V )

L
N spike L Fuse (F1) (Z1) (NTCR1) (N)
[size=16] ҡ ( ).


[url=http://static.howstuffworks.com/gif/surge-protector-ch.jpg][/url]

:


[url=http://static.howstuffworks.com/gif/surge-protector-diagram.gif][/url]

.

220 . .
( )


[url=http://www.giantup.com/thumb-6-2009-Giantup_CoM_5al5s6tb.jpg][/url][url=http://www.giantup.com/thumb-6-2009-Giantup_CoM_knnlunbu.jpg][/url]

( )

( )

[/size]
[/size]
[/size]
[/size]
[/size]

ENG&mohamed amr


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: 26
: 05/04/2008

    

      


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