1. The problem statement, all variables and given/known data I'm currently trying to find the total resistance of my resistors in my curcuit I have designed. 2. Relevant equations I'm using the equation V = IR, where V = Potential difference in volts, I = Current in Amps and then there's R... It's a constant of sorts but I can't find it. Measured in ohms. 3. The attempt at a solution I have a 2 Ohm resistor which is to reduce a 12V current. I just need to calculate the resistance from the resistor... but I can't work out the formula. Sorry if I seem a bit out of it, I haven't slept in days.