how would be there a voltage source and a source for current

a 1.5 V battery , what is it , a voltage source , a current source ...


what is the difference between a (A source or V source) and a normal battery ... .

 

Voltage source.

 

Hello,

An ideal battery is a voltage source. It will supply the voltage without a voltage drop at higher currents.
A practical battery is a voltage source with a resistor (the internal resistance) in series.
The voltage will drop at higher currents due to the internal resistance.

Greetings,
Bertus

 

what is a current suorce then ?

 

You getting above my I Q level.

 

woh , i think a current source is an electronic device , not a normal battery ...

http://en.wikipedia.org/wiki/Current_source

why would we need a current source while we have voltage sources ?

my proffessor didn't know how to answer this , or thought that it's not important for us ...

 

Hello,

For the current source take a look at this page of the AAC ebook:
http://www.allaboutcircuits.com/vol_1/chpt_9/3.html

Greetings,
Bertus

 

i grasp the concept in general now , thanks .