Calculating Current in a Circuit with R1 = 10 Ohms and R2 = 8 Ohms

[fan_boy17]

Homework Statement

the question is find the current through R1

R1= 10 Ohms R2=8 ohms
current source=9A
E=18V

Homework Equations

The Attempt at a Solution

I have tried removing the current source and i get a short circuit on R1 and hence i obtain a current of 2.25A

 

[dikmikkel]

What you are looking for are kirschoff's laws:
The current entering any junction is equal to the current leaving. So at the top I1 enters and use that together with the "voltage law" then you get the answer

 

[paul2211]

When using superposition on current sources, you should open, instead of shorting, circuit that branch.

That may be where your problem lies.

 

[fan_boy17]

Yes didn't realize that i needed to make the current source open circuit. thanks!