Calculate voltage drop for a circuit

[the-alchemist]

Homework Statement

Homework Equations

V=IR (Ohm's Law)

The Attempt at a Solution

Now I'm able to get V=0 for when R=0 but I'm not sure as to how to solve for I when R=0. Can I ignore the 10 Ohm resistor as it's a short circuit as R=0.

 

[vela]

Now I'm able to get V=0 for when R=0 but I'm not sure as to how to solve for I when R=0. Can I ignore the 10 Ohm resistor as it's a short circuit as R=0.

No, you would only be able to ignore the 10-ohm resistor if it were in parallel with the short circuit.

What you want to do is apply Kirchoff's current law to the node a or b. To do that, though, you'll first want to find the voltage drops in the circuit.