Chapter 23 Homework

One-Step Calculations

1, 6

Exercises

1, 2, 3, 7, 9, 10, 16, 19, 20, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 34, 35, 40, 43, 44, 45, 46, 47, 59, 60

Problems

1, 3, 6

The additional problems that follow are due at the next exam.  They are worth 10 points.

A. Explain the purpose of a fuse or circuit breaker.

B. A 15A fuse blows in your home.  You have a 12A and a 20A fuse in your supplies.  Which, if either, may you use without risking damage to your houses wiring. Explain.

C.  Your kitchen outlets are all on the same 20A circuit breaker.  You have a microwave with a 1200W power rating.  Your have a toaster with 20Ω of resistance.  You have a warming pad that draws 3A of current.  If all three devices are operating at the same time, does the circuit breaker trip?  Explain.

D.  You have a 1200W space heater and you run it for 8 hours a day in January.  If your electricity costs $0.15 per kilowatt-hour, how much did it cost to run the heater?