Determine potential difference (circuits)

[kyle]

Homework Statement

V_a - V_b

Homework Equations

V = IR
Loop rule
Node rule

The Attempt at a Solution

I'm able to find each I value, as well as the direction of current. I'm not sure what to do after that. I know the answer should be 45V, but everything I've tried doesn't lead to that.

 

[ehild]

Choose the zero of the potential at b. Knowing the currents on each resistor, choose a path leading from b to a, find the change of potential across each element. Note that the potential decreases in the direction of flow of a current.


ehild

 

[mr_pavlo]

45,3846V exactly, that is 590/13V

 

[ehild]

45,3846V exactly, that is 590/13V

It looks correct.

ehild