Name:__________________
Date:__________
1. A ___ ____ consists of a zinc can, a ______ rod in the center of this can, and a chemical paste of _________ _________.
2. Potassium hydroxide is an __________.
3. When an element loses electrons, it is said to be ________.
4. When an element gains electrons, it is _______.
5. An __________ is a compound which has an electric charge.
6. In the dry cell, the electrolyte ________ the zinc and the electrolyte becomes _______.
7. Removed electrons collect at the ________ terminal.
8. Electrons return to the dry cell by way of the ________ terminal.
9. A single dry cell can generate _ . _ volts of electricity.
10. If several dry cells are put together, you have what is commonly known as a _______.
11. A two dry cell battery produces _ volts of electricity.
12. A three dry cell battery produces _ volts of electricity.
13. A ten dry cell battery would produce _ _ volts of electricity.
14. The dry cell is called an ______________ ____ because chemicals called ___________ oxidize zinc and become reduced to produce a flow of ________.
15. _________ __________ is today the most commonly used electrolyte.
16. Potassium hydroxide is a ____ or an ________ substance.
17. Another kind of electrochemical cell is the ___ cell.
18. The typical automobile battery is an example of a ______ of wet cells.
19. The wet cell has two different metal plates called ________ which are in a liquid called an electrolyte. The two metals are usually ____ and ____ _______.
20. The electrolyte in a wet cell is usually ________ ____ which is diluted in _____.
21. In a wet cell, the ________ ____ electrolyte oxidizes the ____ and reduces the ____ _______.
22. Each wet cell can produce _ volts of electric current.
23. A six volt car battery has _ wet cells, and a 12 volt car battery has _ wet cells.
24. Dry cells and wet cells produce only ______ _______ ( _ _ ).
25. In ______ _______, the electrons move only in one direction.
26. ___________ _______ ( _ _ ), has electrons which move back and forth in a regular, repeating cycle.
27. Household current in the U.S.A. is _ _.
28. Household current in the U.S.A. is _ _ cycles per second or
_ _ _____.
29. 60 hertz means that the electrons move ____ and _____ 60 times in a ______.
30. The advantage of A.C. over D.C. is that A.C. can be ___________ over longer distances with less ______ ____ than D.C.
31. A.C. can be ___________ up or down, and _ _ cannot.
32. ________ __________ convert electric current to heat, light and motion.
33. If you connect just one wire to an electric appliance it will
___ work.
34. In order for electrons to ____, electrons must have a ______ path to travel.
35. The path which electrons travel is called a _______.
36. An electric circuit consists of:
1.__________________________________________________________
2. ________
3. ______
4. ________
37. A _____ is the device that uses electrons, such as a _____ ____, _____, _________ ____, or _ _.
38. Wire is usually made of _____ or ________.
39. Wires must be made of substances which are ____ __________ of ________.
40. _______ means capable of being made into wires.
41. With a switch, the "on" position _______ the circuit.
42. With a switch, the "off" position ______ the circuit.
43. If all loads are connected one after another, the circuit is a ______ circuit.
44. The disadvantage of a ______ circuit is that if there is a break in any part of the circuit, the entire circuit is ____ and electrons cannot ____.
45. In the _______ _______, the different loads are on separate branches, so that there are _______ paths for electrons to take.
46. In the parallel circuit, a break in the circuit does not ____ the entire circuit.
47. All modern electrical wiring uses ________ _______.
48. The ____ is the part of the circuit which produces __________.
49. The SI unit for measuring resistance is the ___.
50. To protect against circuit overload, most electric circuits have either _____ or _______ ________.
51. A ____ has a thin strip of _____ through which the electric current flows.
52. If the resistance becomes too great, the heat causes the metal strip to ____. breaking the flow of electricity by _______ the circuit.
53. A more modern method to protect against circuit overload is the _______ _______.
54. _______ ________ have a switch which opens the circuit if resistance becomes too high.
55. Circuit breakers are preferred over fuses because they are ____ __ ____ and do not have to be ________ after each overload.
56. ____ ________ are more expensive than _____.