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: