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chapter17cf

chapter 17 notes and vocab

QuestionAnswer
1. Law of electric charge Like Charges repel and opposite charges attract
2. Law of electric charge drawing
3. Electric Force The Force between objects
4. Electric field A region around a charged particle that can exert a force on another charged particle
5. 3 ways to “Charge It” p. 424 Friction, Conduction, Induction
6. Drawings for each of the 3 types
7. Conservation of Charge No charges are created or destroyed. Electrons move from one atom to another.
8. How can a charge be detected? Using a device called an electroscope
9. Drawing of # 7 7
10. Conductors A material in which charges can move easily
11. Examples of conductors Copper, silver, aluminum, and mercury
12. Insulators A material in which charges cannot easily move
13. Examples of insulators Plastic, rubber, glass, wood, air
14. Static Electricity The buildup of electric charges of an object.
15. Electrical discharge The loss of static electricity as charges move off an object
16. Lightning One of the most dramatic examples of electric discharge
17. Lightning diagram. 428
18. Lightning Rods A Pointed rod connected to the ground by a wire
19. Grounded Objects that are in contact with the ground.
20. Dangerous places when it is lightning include Open Areas, Beach, Golf Course, Under a tree
21. Cell A Device the produces an electric current by converting chemical energy into electrical energy
22. Battery Converts chemical energy into electrical energy and is made of severl cells
23. Parts of a battery electrolyte & electrode Electrolyte: The mixture of chemicals in a cell Electrode: Part of the cell through with charges enter and exit
24. Types of Battery Cells Wet Cells Dry Cells
25. What is the relationship between potential difference & volts Volts is how potential difference is expressed
26. Photocells & examples The part of a solar panel that converts light into electrical energy. Calculator
27. Thermocouple Converts thermal energy into electrical energy
28. Drawing of thermocouple
29. Electrical current p. 433
30. Two types of electrical current Direct Current Alternating Current
31. Direct Current & diagram Charges always flow the same direction
32. Alternating Current & diagram Charges continually swich from flowing in one direction to flowing in the reverse direction
33. Voltage The difference in energy per unit charge as a charge moves between two points in the path of a current
34. Resistance the opposition to the flow of electric charge
35. What is the relationship between resistance & current Resistance effects how well electrical currents can move
36. How thickness, length & temperature effect electrical current A short, thick, cold pipe would have the least resistance
37. What is Ohm’s Law?
38. Electrical Power Formula
39. Watt
40. How is household energy measured by the energy company
41.Circuit – a complete , closed path through which electric charges passes
42.Load – a device that uses electrical energy to do work
43. What do ALL loads do ? – offer some resistance to electrical energy to change into other forms of energy
44. Explain the relationship that a switch plays in “opening” or “closing” a circuit. – by opening the circuit it turns the light off but when it closes the light will be turned on
45.Series circuit all parts are connected in a single loop
46. How many paths are in a series circuit? One circuit
47. Draw an example of a series circuit in your notebook
48. Explain what happens if one load in a series circuit is malfunctioning. – than the other loads wont work
49. Parallel circuit – a circuit in which different loads are located on separate branches
50. Why is this circuit important in the wiring of the lights in a building ? – each bulb glows as bright as can be no matter what and you can easily change paths
51. Explain what happens if one load in the circuit is malfunctioning – they can function even if one of the loads are broken
52. Give an example of a parallel circuit in your house. – the lighting hooked up from room to room in my house
53. Using the last paragraph p. 444 and fig. 26, explain the causes and dangers of overloading a circuit – this can cause sparks and outages , and the sparks can even start a fire
54. Explain how a fuse and circuit breakers help with circuit safety in your house and automobile – circuit breakers can help you from blowing a fuse because when a circuit would get to hot it will automatically open it up.
Created by: CourtneyFrancis
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