How to Calculate Power When Voltage and Current are known [Formula for Beginners]

Today you’ll learn the basic formula to calculate power when voltage and current are known.

P = VI
P = Power
V = Voltage
I = Current

Power Calculations from Voltage and Current

An electrical circuit has 5 A current flowing through it when 12 V battery is connected across it. Find the watts.
Solution: From formula:
P = VI = 5 A * 12 V = 60 Watts
The formula sheet below summarizes the units, symbols, and formula:

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