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Homework exercises on Alternating Current Electricity for a Physical Science course. Also refer to physics, static electricity, AC, DC, magnetism, Edison, Tesla, education, distance learning, Ron Kurtus, School for Champions. Copyright © Restrictions
AC Electricity - Homework Answers
After you have completed the AC Electricity Homework, you can refer to these answers. Although it is better to have known the answer from your reading, the process of writing the correct answer on your homework sheet will help you remember the concepts.
1. Who is responsible for popularizing AC electricity?
Tesla.
2. What is the difference between AC and DC electricity?
In AC the electrons go back and forth, while in DC they travel through the wire.
3. How do you make AC electricity?
By modifying a DC generator.
4. How fast does your home AC electricity cycle back and forth?
60 cycles per second (Hertz) in the U.S. and 50 Hz in Europe.
5. What are the one major advantages of AC over DC?
You can transform the voltages.
6. What is the classical definition of power?
Power = Work x Time
7. What is the equation for electric power?
Power = Voltage x Current
8. If you used a 1500 watt hair dryer for 1 hour every day, how much would the electric company charge you on your bill at $0.07 per kilowatt-hour for 1 month (30 days)?
1500 watt / 1000 = 1.5 kilowatt
1.5kw x 30 hours x $0.07/kw-hr = $3.15.
9. What happens to the poles on an AC electromagnet?
The alternate.
10. How does a moving or changing magnetic field effect a wire?
It creates an electric current in the wire.
11. What is an AC electromagnet with two sets of wires wrapped around its core called?
A transformer.
12. If the output wire of an AC transformer had twice the turns around the core as the input wire, and the input voltage was 120 volts, what would be the output voltage?
240 volts.
13. What is an example of using a transformer at home?
The adapters used to power devices that can also be battery operated
Where can you go from here?