P = V × I
Power
24 W
P = I² × R
Power
40 W
P = V² / R
Power
14.4 W
Electrical Power Formulas
- P = V × I (Power = Voltage × Current)
- P = I² × R (Power = Current² × Resistance)
- P = V² / R (Power = Voltage² / Resistance)
These are all derived from Ohm's law (V=IR) combined with P=VI. Use whichever form matches the values you know.