Download Electricity guided reading

Electricity
Name: ___________________________
Section 17.1 Electric charge and Force
1. Why do you receive a shock? ___________________________________________________________________
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2. Electric Charge is _____________________________________________________________________________
3. What type of charges can an object have? _________________________________________________________
4. Positive and negative charges are said to be __________________________. Objects with equal _____________
and _________________________ charges have no ______________ _________________________.
5. How is electric charge like energy? _______________________________________________________________
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6. What happens when you rub 2 balloons across your hair? ____________________________________________
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7. Like charges _____________________________, Opposite charges ________________________________.
8. Explain why objects have a negative charge. _______________________________________________________
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9. Explain why objects have positive charges. _________________________________________________________
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10. What SI unit is used to measure electrical charge? _________________________________________________
11. Which electrons are the ones that typically move? __________________________________________________
12. When can electrons be transferred from one material to another? _____________________________________
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13. What are electrical conductors? _________________________________________________________________
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14. Give an example of an electrical conductor? _______________________________________________________
15. What are electrical insulators? __________________________________________________________________
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16. Give an example of an electrical insulator? ________________________________________________________
17. Explain an induced charge. _____________________________________________________________________
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18. Explain how objects can be charged by contact. ____________________________________________________
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19. Explain how objects can be charged by friction. _____________________________________________________
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20. How does polarization affect insulators? __________________________________________________________
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21. What is an electric force? ______________________________________________________________________
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22. Give an example of an electric force. _____________________________________________________________
23. The electric force at the atomic and molecular levels is responsible for __________________________________
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24. What two variable effect electric force? ___________________________ and ____________________________
25. What is an electric field? _______________________________________________________________________
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26. How is the electric field differ for a positive charge and a negative charge atom? __________________________
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27. Draw a picture of the field lines around an isolated positive charge atom and an isolated negative charged atom.
28. Draw a picture of the field lines around two positive charges and describe what is happening.
29. Draw the field lines around a positive and negative charge and describe what is happening.
Section 17.2 Current
30. What is electrical potential energy? ______________________________________________________________
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31. How does this compare with a ball rolling downhill? _________________________________________________
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32. What is potential difference? ___________________________________________________________________
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33. The SI unit for Potential Difference is ______________________________________________________.
34. What sets charges in motion? ___________________________________________________________________
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35. What is an electric current? _____________________________________________________________________
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36. What is resistance? ___________________________________________________________________________
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37. What is Ohm’s Law? ___________________________________________________________________________
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38. What equation represents Ohm’s Law?
39. Conductors have __________________________ resistance. Give an example____________________________
40. Insulators have __________________________ resistance. Give an example_____________________________
41. What are semiconductors? _____________________________________________________________________
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42. What are superconductors? ____________________________________________________________________
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Section 17.3 Circuits
43. Name 3 parts of an electric circuit
Part
1.
2.
3.
Definition
Example
44. What is the closed conducting PATH called between a load, energy source, and wires called?
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45. What is it called when there is NOT a connected path? ___________________________________
46. What can you use to open and close the path of a circuit? ________________________________
47. How does a switch work? _____________________________________________________________________
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48. Draw a schematic symbol for the following:
Closed switch
Open switch
Battery
Light bulb
Wires
49. When appliances are connected in a series circuit, they form a _______________ ________________ (2 words)
for charges to flow.
50. If one element along a path in a series circuit is removed, what will happen? _____________________________
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51. Draw a picture of a series circuit (picture, not a schematic… You could draw both if you wanted )
52. What is the difference between a series and a parallel circuit? ________________________________________
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53. Draw a picture of a parallel circuit.
54. What happens when a charge moves through a circuit?
55. What is electrical power? How is it calculated?
56. The SI unit for Power is ______________________________________________________.
57. How do electric companies measure energy?
58. Explain why circuit breakers and fuses are important.