1. Chapter 20

2. You and your teammates will each take turns answering review questions. If correct, your team will earn a point. You also will have a chance to shoot a paper wad into the trash bin for extra points. From the back of the room? (+3) From the six foot marker? (+1) The winning team will win prizes! All students must record correct answers and point values in order to win!

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4. Q UESTION 1 A material has a net electric charge because it has an excess or shortage of _________________.

5. Q UESTION 2 Which set of charges will repel? Like charges OR opposite charges?

6. Q UESTION 3 Electric field strength depends on the net charge and _____________ from the charge. Field of a positive charge

7. Q UESTION 4 What is the SI unit for charge?

8. Q UESTION 5 True or False? Doubling one charge doubles the force on both charges.

9. Q UESTION 6 Charges can be transferred by friction, by contact, and by __________________.

10. Q UESTION 7 The image below represents charging by _____________________.

11. Q UESTION 8 Static _______________ occurs when a pathway through which charges can move forms suddenly.

12. Q UESTION 9 The diagram below represents charging through ________________.

13. Q UESTION 10 The study of the behavior of electric charges is called ____________________.

14. Q UESTION 11 The law of conservation of charge states that the total charge in an isolated system is ____________.

15. Q UESTION 12 The continuous flow of electric charge is an electric ______________.

16. Q UESTION 13 What is the SI unit for electric current?

17. Q UESTION 14 What are the two types of current?

18. Q UESTION 15 A material through which electrons flow easily is called an electrical _________________.

19. Q UESTION 16 Wood, plastic, rubber, and air are all examples of good electrical ___________________.

20. Q UESTION 17 The opposition to the flow of charges in a material is called ________________.

21. Q UESTION 18 What is the name for the SI unit of resistance?

22. Q UESTION 19 Which type of wire will produce less resistance? A thin wire OR a thick wire?

23. Q UESTION 20 A material’s thickness, length, and ___________________ affect it’s resistance.

24. Q UESTION 21 As temperature increases, a metal’s resistance increases because electrons ________________ more often.

25. Q UESTION 22 A _________________ is a material that has almost zero resistance when cooled to low temperatures.

26. Q UESTION 23 In order for charge to flow in a conducting wire, the wire must be connected in a complete loop that includes a ______________ of electrical energy.

27. Q UESTION 24 Potential difference is electrical potential energy between two places in an electric ____________.

28. Q UESTION 25 What is another term for potential difference?

29. Q UESTION 26 A device that converts chemical energy to electrical energy is called a _______________.

30. Q UESTION 27 The rate at which electrical energy is converted into another form of energy is called electric _____________________.

31. Q UESTION 28 The following equation is called _________________. V = I x R

32. Q UESTION 29 What letter in the equation below represents current? V = I x R

33. Q UESTION 30 Electric power companies usually determine charges on your bill with what unit?

34. Q UESTION 31 Which symbol in the circuit diagram below represents a switch? A B C D

35. Q UESTION 32 What type of circuit is shown in the diagram below? Is it series or parallel?

36. Q UESTION 33 Which safety device has an internal wire that melts when the current becomes to great?

37. Q UESTION 34 True or False: If one light in a series circuit burns out, the remaining lights will still operate.

38. Q UESTION 35 Which safety device is a switch that opens up when the current becomes too great?

39. A NSWER K EY 1. electrons 2. like 3. distance 4. coulomb 5. True 6. induction 7. contact 8. discharge 9. induction 10. Static electricity 11. constant 12. current 13. ampere 14. DC & AC 15. conductor 16. insulators 17. resistance 18. ohm 19. thick 20. temperature 21. collide 22. superconductor 23. Total internal reflection 24. Diffraction 25. Trough 26. battery 27. power 28. Ohm’s Law 29. I 30. kilowatt-hour 31. A 32. parallel 33. fuse 34. False 35. circuit breaker