# Porential across current source

1. Nov 1, 2008

### Altairs

1. The problem statement, all variables and given/known data
Title says it all. Question is attached.

2. Relevant equations

Simple KCLs, KVLs etc

3. The attempt at a solution

What I don't get is that isn't $$I_{R_{4}} = \frac{R_{3}}{R_{3}+R_{4}} * I1$$

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2. Nov 1, 2008

### CEL

This expression is for a current divider. It would be valid if R3 and R4 were in parallel, wich they are not.
Write Kirchoff's equations for the 3 loops to obtain the voltages on the terminals of R4 and R2. The voltage on the source is the difference between them.