finding current direction?

daddeeee · Jan 10, 2009

in kcl how will i find the direction of current through a ckt?
i want the direction of each node in this ckt and explanation as why we have taken these directions?

FvM · Jan 10, 2009

This is the solution method https://en.wikipedia.org/wiki/Kirchhoff's_circuit_laws
This literature explains circuit theory very verbosely:

stanislavb · Jan 10, 2009

Generally current direction is from"+" to"-". Therefore voltage drop on some element of circuit is potential in start point minus potential in end point. However if you will get(after calculation) negative result it merely means more positive potentinal located in the end of stub and more negative in start. Accordingly will be redefined current direction.

LvW · Jan 10, 2009

stanislavb said:
Generally current direction is from"+" to"-". Therefore voltage drop on some element of circuit is potential in start point minus potential in end point. However if you will get(after calculation) negative result it merely means more positive potentinal located in the end of stub and more negative in start. Accordingly will be redefined current direction.

Yes, stanislavb is completely correct.
To make it clear to you: You are free to choose any direction you want. Therefore, one cannot "explain" why a certain direction is assumed. And, after calculation according to the known rules, you will see if your assumption was right (pos. sign for current) or wrong (neg sign).

finding current direction?

daddeeee

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finding current direction?

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