![Page 1: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/1.jpg)
UNIT V STUDY GUIDEElectricity & Magnetism
ANSWER KEY
![Page 2: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/2.jpg)
1. Electricity is basically moving ____________.
• electrons
![Page 3: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/3.jpg)
2. What is resistance?
• The opposition posed by a material to the flow of current.
![Page 4: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/4.jpg)
3. What are the two factors of a wire that determine resistance?
• Length• Area (diameter)• Additional factors –
Temperature & Material Type.
![Page 5: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/5.jpg)
4. Resistance is measure in what unit?
• Ohms (Ω)
![Page 6: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/6.jpg)
5. A closed path that allows current to flow is called a __________.
• Circuit
![Page 7: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/7.jpg)
6. Describe the difference between a parallel and series circuit?
• Circuit
![Page 8: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/8.jpg)
7. What are examples of when you would use each type of circuit?
• Series – used for things with batteries.• Parallel – used around the
house; when things get their power from generators.
![Page 9: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/9.jpg)
8. What is the name of a device used to prevent overheating of circuits?
• Resistor
![Page 10: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/10.jpg)
9. What is AC?
• Alternating Current• Electron direction is constantly
flipping; electric field is changing directions.
![Page 11: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/11.jpg)
10. What is DC?
• Direct Current• Electrons flow & electric field is
in one direction.
![Page 12: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/12.jpg)
11. Which (AC or DC) is a battery?
• DC (Direct Current)
![Page 13: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/13.jpg)
12. What “makes” AC?
• Generators
![Page 14: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/14.jpg)
13. What does an electric motor do? (Hint: what form of energy does it start with and then convert to?)
• Converts mechanical energy into electrical energy.
![Page 15: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/15.jpg)
14. What are the charges of electrons, protons, and neutrons? Why are electrons the easiest to “remove”?
• e- negative• p+ positive• n0 neutral• Electrons are easiest because
they are in the electron cloud.
![Page 16: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/16.jpg)
15. What is the difference between conductors and insulators?
• Conductors allow the flow of electric current.• Insulators resist the flow of
electric current.
![Page 17: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/17.jpg)
16. What is the definition of current?
• The rate at which charges move through a conductor.
![Page 18: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/18.jpg)
17. What is the unit of current?
• Amperes / Amps (A)
![Page 19: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/19.jpg)
18. What is the equation to calculate voltage?
•V = I·R
![Page 20: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/20.jpg)
19. What is the voltage if the current is 10 amps and the resistance is 2 ohms?
• 20 volts
![Page 21: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/21.jpg)
20. If 2 resistors are in series, what mathematical function must you use to determine the “equivalent resistance”?
• REQ = R1 + R2 + …
![Page 22: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/22.jpg)
21. If one light goes and the others go out, what type of circuit do you have?
• Series
![Page 23: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/23.jpg)
22. How can you induce current in a wire with a magnet?
• By moving the magnet back and forth (changing the electric field)
![Page 24: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/24.jpg)
23. How would you make an electromagnet?
• By wrapping a wire supplied with current around an iron core.
![Page 25: UNIT V STUDY GUIDE Electricity & Magnetism ANSWER KEY](https://reader035.vdocuments.site/reader035/viewer/2022081506/56649ebb5503460f94bc41c8/html5/thumbnails/25.jpg)
24. Be able to draw series and parallel circuits.
SERIES EXAMPLE: PARALLEL EXAMPLE: