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Kirchoff's Rule on Circuits

by fubag
Tags: circuits, kirchoff, rule, solved
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Mar8-08, 11:29 PM
P: 105
1. The problem statement, all variables and given/known data

What is the potential difference V_{ab} of point a relative to point b?

I found out earlier that the current in the top branch is 0.8 A

In the middle is 0.2 A

and at the bottom is 0.6A

2. Relevant equations

So V = IR - IR

3. The attempt at a solution

3*(0.8) - 4*(0.2) = 1.6V

But this isn't working for me...what am I doing wrong?
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Mar9-08, 03:14 AM
P: 83
the direction of 0.2 A current is in opposite direction...
Mar9-08, 01:04 PM
P: 105
oh thanks a lot!

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