Electronics & Circuits
Basic
Power (I²R)
Power lost as heat in a resistor.
Formula
Variables
ICurrent
RResistance
Example
2² × 5 = 20W
Did You Know?
The I²R heating law is why thin, overloaded wires get dangerously hot and why fuses exist.
Power lost as heat in a resistor.
2² × 5 = 20W
The I²R heating law is why thin, overloaded wires get dangerously hot and why fuses exist.