# Help with figuring out voltage

1. Sep 26, 2011

### naivy

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
I got V1=18V
Here's my work:

2. Sep 26, 2011

### omoplata

Can't see the image statement. Imgur.com says image does not exist.

Can see your work though. Is that line connecting + and - a conductor?

3. Sep 26, 2011

### naivy

Can you see that now?

4. Sep 26, 2011

### omoplata

Yup.

5. Sep 26, 2011

### omoplata

I applied Kirchhoff's Voltage law and V=IR to solve this. The final answer I got is different from yours.

How did you get those first two lines on the left?

6. Sep 26, 2011

### naivy

I actually got a different answer just now too. I got V1 = 37.3333V

7. Sep 26, 2011

### omoplata

Yeah, that's what I get.

8. Sep 26, 2011

### naivy

Would it be possible for you to check my answer to another problem as well?

Thank you!

I get 10.6666mA

Last edited: Sep 26, 2011
9. Sep 26, 2011

### omoplata

Need to clear one thing up before I try.

I_s is an ammeter, right?

Ideal ammeters have zero resistance. Since a resistance value is not given for I_s, it has to be assumed to be an ideal ammeter. Then the current is going to bypass the 8k and 4k resistors.

10. Sep 26, 2011

### naivy

Is is a current source.

11. Sep 26, 2011

Oh, OK.