More Electrical Power
Here's our new equation: P = I² × R
So, if we know the resistance of something, and the current through it, we can work out its power (the energy output from it each second).
e.g. A 10 ohm resistor has a 2 amp current through it.
It's power output is:
P = I² × R = 2² × 10 = 40 W
It's as simple as that!