Saturday, November 24, 2012

Ohm's law

Ohm's Law    
For a fixed metal conductor, the temperature and other condition remaining constant the current through it is proportional to the potential difference between conductor ends.

V/I = Constant


V  = volt 
 I  = Current
 R = Resister of the conductor between the two pints considered

we can apply V=IR  Linear resistors only.

Linear Resistors
Current is directly proportional to the applied voltage. Their current versus applied voltage is straight and linear. In other words, their resistance remains constant.

Non-Linear Resistors
Resistors are those whose current does not change linearly with changes in applied voltage.


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