Question

1. In an old house, the wires leading to a 120 V outlet have a total resistance of 0.45 Ω. When you plug in a hair dryer, it draws a 19 A current.

- How much does the outlet voltage decrease due to the voltage drop across the wires? Express your answer with the appropriate units.

- What is the power dissipated as heat in the wires? Express your answer with the appropriate units.

2. A typical American family uses 1000 kWh of electricity pro 30 days. What is the average rms current in the 130 V power line to the house?

Answer 1