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Chapter17Christian
| Question | Answer |
|---|---|
| Law of Electric Charge | like Charges repel and opposite charges attract |
| Electric Force | Force between charged objects |
| Electric Field | a region around a charged particle that can exert a force on another charged particle |
| 3 Ways to “charge it” | Friction, Conduction, Induction |
| Conservation of Charge | no charges are created or destroyed |
| How can a charge be detected | using an electroscope |
| Conductor | material in which charges can move easily, |
| Ex of Conductor | copper, silver, aluminum, mercury |
| Insulator | Material that charges can’t move easily |
| Ex of Insulators | plastic, rubber, glass, wood |
| Static Electricity | Buildup of electric charges on an object |
| Electric discharge | loss of static electricity as charges move off an object |
| Lightning | one of the greatest examples of electric discharge |
| Lightning Rods | Pointed Rod connected to the ground through a wire |
| Grounded | objects in contact with the earth |
| Dangerous places to be In a lightning storm | Beaches, Golf courses |
| 21. Cell | device that produces an electric current by converting chemical energy into electrical energy |
| 22. Battery | device made of many several cells does the same thing |
| 23. Parts of a battery – electrolyte & electrode | Electrolyte= mixture of chemicals that turns chemical energy into electrical energy, Electrode=two conducting metals that make contact with the electrolyte, charges enter or exit |
| 24. Types of Battery Cells | wet cells and dry cells |
| 25. What is the relationship between potential difference & volts | volts is used to express potential difference |
| 26. Photocells & examples | part of a solar panel that converts light into electricity, calculator |
| 27. Thermocouple | device used to convert thermal energy into electrical energy |
| 28. Drawing of thermocouple | |
| Section 3 & 4 | |
| 29. Electrical current p. 433 | the rate at which charges pass a given point |
| 30. Two types of electrical current | AC and DC |
| 31. Direct Current & diagram | direct current has one direction |
| 32. Alternating Current & diagram | alternating current continually changes direction |
| 33. Voltage | the difference in energy per unit charges 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 can determine the speed of a current |
| 36. How thickness, length & temperature effect electrical current | thick wires have less resistance, long wires have more, the colder the wire the less resistance |
| 37. What is Ohm’s Law? | current, voltage and resistance could be expressed with the equation I=V/R. |
| 38. Electrical Power Formula | Power=Voltage X Current |
| 39. Watt | the unit of electricity |
| 40. How is household energy measured by the energy company | by multiplying the power in kilowatts by the time in hours |
| 41. | |
| 41.Circuit | a complete, closed path through which electric charges flow |
| 42.Load | a device that uses electrical energy to do work |
| 43. What do ALL loads do ? | offer some resistance to electric currents and cause the electrical energy to change into other forms of energy such as light energy or kinetic energy |
| 44. Explain the relationship that a switch plays in “opening” or “closing” a circuit | by turning the switch down then you complete the circuit and by lifting it up, opening the circuit not allowing electricity to travel |
| 45.Series circuit | circuit in which all parts are connected in a single loop. |
| 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 series circuit is malfunctioning | all loads following it will not function |
| 49. Parallel circuit | 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 | if one bulb stops working the rest of the lights will still receive electricity. |
| 51. Explain what happens if one load in the circuit is malfunctioning | the other loads will continue to function. |
| 52. Give an example of a parallel circuit in your house | wiring from my TV, computer, and lights |
| 53. Using the last paragraph p. 444 and fig. 26, explain the causes and dangers of overloading a circuit | overloading a circuit could result in a fire due to increased heat from outlets. |
| 54. Explain how a fuse and circuit breakers help with circuit safety in your house and automobile | fuses prevent electricity to flow if the flow is too high, circuit breakers automatically open the circuit if current is too high. |
Created by:
PhySciLewis1
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