Which direction of current source is correct?

[shaq]

Dear all,

I1 1 0 5mA

Which direction is right in the figure as shown below?

 

[rajanarender_suram]

fig:A is right

 

[jcpu]

hello

Although it's SPICE format,
different simulator might give different interpretation.

 

[gharuda]

An ideal current source 'I ' driving a resistor 'R' and creating a voltage

Both the figures are correct. The direction of flow shows the magnitude.

 

[IanP]

That will depend on the preferences of an author of a book, or a teacher, or a departament of a ministry (of something) in a country you live in ..

References:
https://en.wikipedia.org/wiki/Current_source
https://commons.wikimedia.org/wiki/Image:International_graphic_symbols_of_current_source.png

Regards,
IanP

 

[rajanarender_suram]

the given is

I1 1 0 5mA

generally the notation will be
I p n i1A

p---positive terminal
n---negetive terminal

as current flows from Positive term to neg terminal(except in voltage sources)
hence we generally consider it as fig A in the spice usage

 

[bangash]

both of them are correct. if u are still facing problems convert it into voltage source

 

[grobar]

They're all good, Fig B is probably a photodiode .

 

[sachinagg77]

I1 1 0 5mA => Figure A is correct: 5mA Current flows from NODE 1 to NODE 0.

I1 0 1 5mA => Figure B is correct: 5mA Current flows from NODE 0 to NODE 1.

 

[huojinsi]

As sachinagg77's post, Figure A and B are both correct!

 

[wanily1983]

why both are right? because the definition is different in different books.

 

[harrytrinh]

They are correct both. They just indicate the magnitude and the direction is depend on how that current through.

 

[qutang]

your current is from pin to ground.

 

[Teddy]

Funny, I was fighting this one for some time.
In Eastern Europe they used B and the reason was the electron flow. A is used in Western world and since west won over east I use the A froms 1989!
But it is just a preference of author really.

 

[hackjiang]

Current is flowing to ground.

 

[hamdard]

Both are corect. only difference is that their direction is reversed.

 

[ivar4ever]

both are correct, to cross chek this just convert them to voltage sources and see.

 

[surajit]

both direction are correct, because it's just a direction right..so it solely depends on the convension u use..otherways u can say beside A, B is also currect because the upper potential may be below gnd..so current is flowing through that direction..

 

[stoned]

current flow to the blower potential direction, it's just a direction, so surajit's post is the best explanation

stoned