Voltage drop across a resistor in a circuit

[pcml100]

Homework Statement

Three batteries and four resistors are connected in a loop as shown (see attachment).

What is the voltage drop across the top left resistor?

Homework Equations

V = IR

The Attempt at a Solution

This is part 3 of the 3 questions for this problem. On the other two I found the current of the loop and the voltage across points a and b.

I think that all I need to do here is multiply IR (R being the value of that resistor) but that just seems too easy. Do I have to subtract it from the total voltage for the circuit or something?

 

[jhae2.718]

All you need to do is use loop laws to find the current, and then you can find the voltage drop over the resistor using Ohm's law.

 

[pcml100]

Ok. I already found the current in the circuit and I assumed that I needed to use Ohm's Law to find the voltage drop, but my question is whether I just multiply the current in the loop by the value for the specific resistor and that's it, or if I have to do something after that step?

 

[jhae2.718]

That's it.

 

[pcml100]

Awesome. Just seemed too easy so I thought maybe something else was going on. Thank you