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A typical american family uses 1000 kWh of electricity a month

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A typical american family uses 1000 kWh of electricity a month.

What is the average rms current in the 120 V power line to the house?

On average, what is the resistance of a household?

The back of the book says the answer to part 1 is 12 A, and the Resistance is 10 ohms.

Can someone please explain how these results are obtained?