Answer to Question #313068 in Physics for dle

Question

The heating element in a hair dryer is rated at 5kW and 220V . How much current does it draw?

Answer 1

The power of electrical current is given by

$$P=IV$$

Hence, the electrical current

$$I=\frac{P}{V}$$

$$I=\rm \frac{5000\: W}{220\: V}=22.7\: A$$