## Voltage drop across a resistor in a circuit

1. The problem statement, all variables and given/known data

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

What is the voltage drop across the top left resistor?

2. Relevant equations

V = IR

3. 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?
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
Attached Thumbnails

 PhysOrg.com science news on PhysOrg.com >> Heat-related deaths in Manhattan projected to rise>> Dire outlook despite global warming 'pause': study>> Sea level influenced tropical climate during the last ice age
 Blog Entries: 9 Recognitions: Gold Member 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.
 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?

Blog Entries: 9
Recognitions:
Gold Member

## Voltage drop across a resistor in a circuit

That's it.

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

 Tags circuit, current, resistor, voltage, voltage drop