When you look at the Ohm’s Law Wheel, select this formula: I = W/E (amps = watts volts); I = 5,000 watts by 240 volts; I = 20 ...
(It’s called Ohm’s Law.) For example, if you know the voltage drop across a known value of resistance, you can work out how much current must be passing through the resistor. Let’s look at an example ...