Finding the Current in a circuit, with series opposing voltage sources.

[Killstudy]

Homework Statement

V1-12V
V2-9V
R1-4 Ohms
R2-7 Ohms
R3-8 Ohms

Each current has to be found when the switch (k) is both open and closed.

Homework Equations

The Attempt at a Solution

I can find each current when the switch is open, however I'm confused at what would happen when it becomes closed.

 

[ehild]

Hi Killstudy, welcome to PF. I hope your studies do not kill you.

The forum rules here says that you need to show your attempts for solving the problem. How did you solve the case with open switch?

If the switch is closed you have two loops and need to use Kirchhoff' rules.

ehild