# Homework Help: Lab Practical Circuit. Find Unknown Resistance.

1. Nov 28, 2011

### pradeepk

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

So I have to wire the circuit and find R2 by only making another voltage measurement. We know that R3 is equal to 1000 ohms.
2. Relevant equations

3. The attempt at a solution

So I was thinking that you can find the voltage of R3 and the find the current going through R3. When you have those measurements, you can find the R2 because you know the potential difference by (6-Voltage of R3). Then you use the current found previously, and the ohms law. Is this correct? Thank you

Last edited: Nov 28, 2011
2. Nov 28, 2011

### Staff: Mentor

Pradeepk, it would appear that your attachment isn't actually attached.

3. Nov 28, 2011

### pradeepk

My apologies..it should work now

4. Nov 28, 2011

### Staff: Mentor

Yes, it's fine now.

Your method for finding R2 is okay.

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook