Question

A hair dryer has a resistance of 11.5 . What current does it conduct when it is plugged into a wall outlet that provides 120 V?

0.10 A
10.4 A
109 A
1380 A

Answer 1

Use Ohm's law: I = V / R = 120 V / 11.5 Ω ≈ 10.43 A.
Answer: 10.4 A.