Electrical networks(linear algebra)

[EV33]

Homework Statement

Determine the currents in the various branches.

Then there is a picture of the network which has batteries, resistors, and nodes.

Most of the problems have the currents labeled.

My question is when the currents are not labled how do you determine where to put them and what direction to give them?

Homework Equations

No equations.

The Attempt at a Solution

By looking at the the various electrical networks in the book it looks like you can put the currents anywhere and in any diretion.

 

[HallsofIvy]

Without the picture, this question makes no sense at all! In any case, it looks like a physics problem to me. The whole point is to find the currents using such physics laws as the drop in voltage over a resistor and "conservation of charge".

I'm going to move this to physics homework.