What are the three formulas for electric power?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The three fundamental formulas for calculating electric power are:
- P = V × I (Power = Voltage × Current)
- P = I² × R (Power = Current squared × Resistance)
- P = V² / R (Power = Voltage squared / Resistance)
These formulas are derived from Ohm's Law and allow you to calculate power when you know different combinations of voltage (V), current (I), and resistance (R). Choose the formula based on which values you have available.
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