Need help figuring things out in a very simple circuit!!!
I have an AC motor rated at 120 Volts, 60 Hertz and 4.5 Amps. I've already tried connecting this motor straight to a wall outlet, and it works fine. The problem is, I want to control how fast it spins. So, I plan on using a variable resistor connected in series. However, I seem to have already burnt out a 20k variable resistor and I want to know whats going on before I try anything else. I have a 1M and a 2M resistor waiting to be tested but I'm unsure whether or not they will burn out like the 20k! The confusing part is I don't know how to calculate anything because I don't know how much current is coming out of the outlet!