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ch.17 electricity vi
| Question | Answer |
|---|---|
| 1. Law of electric charge | states that like charges repel and opposites attract |
| 2. Law of electric charge drawing | |
| 3. Electric Force | forces between charged objects |
| 4. Electric field | region around a charged particle that can exert a force |
| 5. 3 ways to “Charge It” p. 424 | friction conduction and induction |
| 6. Drawings for each of the 3 types | |
| 7. Conservation of Charge | when you charge objects by any method, no changes are created nor destroyed |
| 8. How can a charge be detected? | Electroscope |
| 9. Drawing of # 7 | |
| 10. Conductors | a material in which particles can move more easily |
| 11. Examples of conductors | copper, silver, aluminum, and mercury |
| 12. Insulators | material in which charges cannot move easily |
| 13. Examples of insulators | plastic, rubber, glass and wood |
| 14. Static Electricity | build of electric charges on an object |
| 15. Electrical discharge | loss of static electricity as charge moves off an object |
| 16. Lightning | most dramatic form of electric discharge |
| 17. Lightning diagram p. 428 | |
| 18. Lightning Rod | pointed rod connected to the ground by a wire |
| 19. Grounded | when earth absorbs an electric charge causing no damage |
| 20. Dangerous places when it is lightning include……. | under trees, open areas, and under water |
| ---------------------------------------------------------------------------------------------------------- | |
| 21. Cell | devise the product of electric current by converting energy to electrical energy |
| 22. Battery | converts chemical energy to electrical energy |
| 23. Parts of a battery – electrolyte & electrode | electrolyte-mixture of chemicals that contains a current. Electrode-part where charge enters or exits. |
| 24. Types of Battery Cells | wet cells and dry cells |
| 25. What is the relationship between potential difference & volts | potential difference is express in volts |
| 26. Photocells & examples | part o a solar panel that converts light into electrical energy |
| 27. Thermocouple | creates thermal energy |
| 28. Drawing of thermocouple | |
| Section 3 & 4 | |
| 29. Electrical current p. 433 | more precisely defined as the rate at which a charge passes through a given point |
| 30. Two types of electrical current | direct current and alternating current |
| 31. Direct Current & diagram | |
| 32. Alternating Current & diagram | |
| 33. Voltage | difference in energy per unit charge as change moves between the 2 points |
| 34. Resistance | opposition to the flow of electrical charge |
| 35. What is the relationship between resistance & current | resistance opposes current like friction to motion |
| 36. How thickness, length & temperature effect electrical current | the resistance varies for each for thickness, length, and temperature |
| 37. What is Ohm’s Law? | determines the relationship between current, voltage, and resistance can be expressed by an equation |
| 38. Electrical Power Formula | volts(v) and ohms (horseshoe) |
| 39. Watt | unit for power |
| 40. How is household energy measured by the energy company | whol is household energy measured by the energy company by multiplying the power in kilowatts by the time and hours |
Created by:
vincent1111
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