Question

A 500-watt vacuum cleaner is plugged into a 120-volt outlet and used for 30 minutes. How much current runs through the vacuum?

Answer 1

P = IV,

P = Power in Watts, I = Current in Ampere, V = Voltage in Volts.

Current, I =   P/ V =  500 w/ 120v  ≈ 4.17 A