Help Needed: Solve Circuit Analysis Problem

[Cetullah]

Hello dear Physics Forums community, I need your help! I m an electrical engineering student in second class, and I m stuck with a different kind of problem (probably different to me only, lawl) in the Circuit Analysis.

I believe this problem will be a stepping stone for the other problems I can't solve yet.

Homework Statement

In the attachment.

Homework Equations

Guess they are the Voltage law and Current Law.

The Attempt at a Solution

I m stuck, can't do a thing, will appreciate the attempts to guide me to solution.

Thank you!

Edit, Lol, the problem asks the voltage difference between point a,(the corner on left-top) and point b(the left-bottom corner of the loop in right)

 

[gneill]

Indicate on your diagram where currents are flowing. Then determine the potential drops across all the components. Do a "KVL walk" from point a to point b.

Hint: A continuous current requires a complete circuit.

 

[Cetullah]

Hmm, so I guess there's no current flowing through the line in the middle?

 

[gneill]

Hmm, so I guess there's no current flowing through the line in the middle?

That happens to be a good guess.

 

[Cetullah]

Nice! And can I simply discard the 5v battery and the 10 ohm resistor when I m doing the KVL walk?

 

[gneill]

Nice! And can I simply discard the 5v battery and the 10 ohm resistor when I m doing the KVL walk?

Nope. The 5V voltage remains 5V no matter what; it's an ideal supply and cannot change. What's the potential drop across the resistor if the current is zero?