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Chapter 17 TermsAE
Airik Evans
| Question | Answer |
|---|---|
| 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 | |
| 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? | The relationship between current, voltage, and resistance could be shown as an equation |
| 38. Electrical Power Formula | Power = votage X Current |
| 39. Watt | The unit for power |
| 40. How is household energy measured by the energy company | Multiplying the power in kilowatts by the time in hours |
| 41.Circuit ….. | A complete, closed path through which electric charges can flow |
| 42.Load …. | A device the uses electrical energy to work |
| 43. What do ALL loads do ? | Offer some resistance to electrical currents and cuas electrical energy to change into ofther forms of energy such as light energy or kinetic energy |
| 44. Explain the relationship that a switch plays in “opening” or “closing” a circuit. | A switch can be closed to turn on electrical devices or opened to turn off electrical devices |
| 45.Series circuit … | A circuit in which all parts are connected in a single lopp |
| 46. How many paths are in a series circuit? | One |
| 47. Draw an example of a series circuit in your notebook | |
| 48. Explain what happens if one load in the circuit is malfunctioning. | The other loads do not work |
| 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 ? | Parallel circuit |
| 51. Explain what happens if one load in the circuit is malfunctioning. | Charges still run through other branches to other loads still work |
| 52. Give an example of a parallel circuit in your house. | The breaker box |
| 53. Using the last paragraph p. 444 and fig. 26, explain the causes and dangers of overloading a circuit | Too many fuses put into one plug may overload it and cause them to stop working or cause a fire |
| 54. Explain how a fuse and circuit breakers help with circuit safety in your house and automobile | Fuses-When temperatures get too high the metal heats up and melts so the circuit is opened. Circuit Breakers-A switch that automatically opens the circuit if the current is too high. |
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PhySciLewis1
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