Physical Science Chapter 13 Exam Review
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____ 1. A material through which electrons do NOT easily flow is a(n) ____.
a. | transformer | c. | insulator |
b. | conductor | d. | fuse |
____ 2. Which of the following is the correct equation to calculate electrical energy?
a. | P = I ´ V | c. | V = P ´ I |
b. | E = P ´ t | d. | P = I/V |
____ 3. Resistance is measured in a unit called the ____.
a. | coulomb | c. | ampere |
b. | volt | d. | ohm |
____ 4. A path that allows only one route for an electric current is called a ____.
a. | series circuit | c. | parallel circuit |
b. | series current | d. | parallel current |
____ 5. If the leaves of an electroscope spread apart, it indicates that ____.
a. | the leaves of the electroscope are neutral |
b. | no charge is moving through the electroscope |
c. | there is static electricity in the electroscope |
d. | the leaves of the electroscope have received a charge |
____ 6. Which of the following is a device designed to open an overloaded circuit and prevent overheating?
a. | transformer | c. | circuit breaker |
b. | magnet | d. | resistor |
____ 7. A static discharge differs from an electric current in that a static discharge ____.
a. | lasts for only a fraction of a second |
b. | involves the movement of ions as well as electrons |
c. | results because a force is exerted on the electrons |
d. | is a flow of electrons |
____ 8. A circuit that has two or more branches for electrons to follow is a(n) ____.
a. | electron circuit | c. | circuit diagram |
b. | series circuit | d. | parallel circuit |
____ 9. The carbon rod in a standard D-cell serves as ____.
a. | a conductor to transfer electrons |
b. | an insulator to prevent electric shock |
c. | part of the chemical reaction |
d. | a negative terminal |
____ 10. The statement that current is equal to the voltage difference divided by the resistance is known as ____.
a. | Ohm's law | c. | Newton's law |
b. | Einstein's equation | d. | Faraday's law |
____ 11. Lightning is ____.
a. | a large discharge of static electricity |
b. | harmless |
c. | a buildup of neutrons |
d. | a high-voltage electric current |
____ 12. Which of the following is the correct relationship among power, current, and voltage?
a. | P = I ´ V | c. | E = P ´ t |
b. | P = I/V | d. | V = P ´ I |
____ 13. One source of constant electric current is a ____.
a. | dry cell | c. | switch |
b. | transformer | d. | coulomb |
____ 14. The rate at which an electrical device converts energy from one form to another is called ____.
a. | electrical power | c. | electrical resistance |
b. | electrical energy | d. | voltage regulation |
____ 15. Electric charge that has accumulated on an object is referred to as ____.
a. | current circuit | c. | current electricity |
b. | circuit electricity | d. | static electricity |
____ 16. A device that increases or decreases voltage in a power line is a ____.
a. | commutator | c. | motor |
b. | generator | d. | transformer |
____ 17. Current that does NOT reverse direction is called ____.
a. | alternating current | c. | direct current |
b. | circuit current | d. | magnetic current |
____ 18. The location of the strongest magnetic forces is the ____.
a. | electromagnets | c. | magnetic fields |
b. | magnetic domains | d. | magnetic poles |
____ 19. Current that reverses direction in a regular pattern is called ____.
a. | alternating current | c. | direct current |
b. | circuit current | d. | magnetic current |
____ 20. The region around a magnet where the magnetic forces act is the ____.
a. | electromagnetic pole | c. | magnetic field |
b. | magnetic domain | d. | magnetic pole |
____ 21. Objects that keep their magnetic properties for a long time are called ____.
a. | electromagnets | c. | permanent magnets |
b. | magnetic domains | d. | temporary magnets |
____ 22. A device that uses an electromagnet to measure electric current is a(n) ____.
a. | galvanometer | c. | electric motor |
b. | commutator | d. | generator |
____ 23. A switch that reverses the direction of the current in a motor is a(n) ____.
a. | galvanometer | c. | electric motor |
b. | commutator | d. | generator |
____ 24. A simple transformer consists of two coils of wire called the ____.
a. | input and output loops |
b. | step-up and step-down generators |
c. | alternating and direct currents |
d. | primary and secondary coils |
____ 25. The function of an electric motor is to change ____.
a. | chemical energy to electrical energy |
b. | electrical energy to chemical energy |
c. | electrical energy to mechanical energy |
d. | mechanical energy to electrical energy |
____ 26. The function of a generator is to change ____.
a. | chemical energy to electrical energy |
b. | electrical energy to chemical energy |
c. | electrical energy to mechanical energy |
d. | mechanical energy to electrical energy |
____ 27. The current that flows in an electric circuit carries ____.
a. | chemical energy | c. | thermal energy |
b. | mechanical energy | d. | electrical energy |
____ 28. Electromagnetic induction is the process of producing an electric current by moving a loop of wire ____.
a. | through a magnetic field | c. | around an iron core |
b. | through a magnetic domain | d. | around a magnetic pole |
____ 29. The atoms in a magnet are ____.
a. | arranged randomly |
b. | aligned according to magnetic fields |
c. | negatively charged |
d. | positively charged |
____ 30. The gauges on the dashboard of a car are ____.
a. | galvanometers | c. | step-down transformers |
b. | step-up transformers | d. | generators |
____ 31. A transformer that increases voltage is a ____.
a. | resistance transformer | c. | step-up transformer |
b. | step-down transformer | d. | voltage motor |
____ 32. In the United States, power lines can carry power voltages as high as 750,000 V, a step-down transformer reduces the voltage to ____ for home use.
a. | 60 V | c. | 60 Hz |
b. | 120 V | d. | 120 Hz |
____ 33. A dry-cell battery produces ____.
a. | an alternating current |
b. | a direct current |
c. | the same current that a generator produces |
d. | both direct and alternating current |
____ 34. The magnetic force of a magnet is ____.
a. | the same at all parts of the magnet | c. | strongest at the poles |
b. | strongest at the center | d. | weakest at the poles |
____ 35. In a step-up transformer, the number of turns of wire is greater in the ____ coil than in the ____ coil, and the ____ voltage exceeds the ____ voltage.
a. | primary, secondary, input, output | c. | secondary, primary, input, output |
b. | primary, secondary, output, input | d. | secondary, primary, output, input |
Matching
Match each term with the correct statement below.
a. | conductor | d. | fuse |
b. | insulator | e. | electroscope |
c. | circuit breaker | |
____ 36. detects the presence of electric charges
____ 37. does not allow electrons to move through it easily
____ 38. allows electrons to move through it easily
____ 39. contains a piece of metal that bends when it gets hot
____ 40. contains a piece of metal that melts if the current becomes too high
True/False
Indicate whether the statement is true or false.
____ 41. Ohm’s law is the tendency for a material to oppose the flow of electrons.
____ 42. Thunder produces air temperatures hotter than the Sun’s surface.
____ 43. Voltage difference is measured in amperes.
____ 44. The unit of power is the kilowatt-hour.
____ 45. Different household appliances use electrical energy at different rates.
____ 46. The presence of a static electric charge can be detected by an electroscope.
____ 47. A fuse is a divice used to keep electrical circuits from overheating.
____ 48. The unit used to measure current is the volt.
____ 49. The zinc rod forms the positive terminal of a dry cell.
____ 50. A lightning bolt occurs when billions of protons are trasferred at the same time.
____ 51. A conductor is a material that doesn’t allow electrons to flow through it easily.
____ 52. The rearrangement of electrons on a neutral object caused by a nearby charged object is called charging by induction.
____ 53. When you bring the south ends of two magnets close together, they repel each other.
____ 54. The strength of an electromagnet can be increased by reducing the number of turns on the wire coil.
____ 55. An electric motor is used to change mechanical energy into electrical energy.
____ 56. Moving a wire through a magnetic field creates an electrical current in the wire.
____ 57. Before alternating current from a power plant can enter a home, its voltage must be boosted or increased.
____ 58. Paper clips and other objects that contain iron can become temporary magnets.
Physical Science Chapter 13 Exam Review
Answer Section
MULTIPLE CHOICE
1. ANS: C PTS: 1 DIF: B OBJ: 1/3
STA: PS2.1 CS3.1
2. ANS: B PTS: 1 DIF: B OBJ: 3/4
STA: PS2.1 CS3.1
3. ANS: D PTS: 1 DIF: B OBJ: 2/4
STA: PS1.3 CS3.1
4. ANS: A PTS: 1 DIF: B OBJ: 3/1
STA: PS1.3 CS3.1
5. ANS: D PTS: 1 DIF: B OBJ: 1/4
STA: PS2.1 CS3.1
6. ANS: C PTS: 1 DIF: B OBJ: 3/2
STA: PS2.1 CS3.1
7. ANS: A PTS: 1 DIF: B OBJ: 1/4
STA: PS1.3 CS3.1
8. ANS: D PTS: 1 DIF: B OBJ: 3/1
STA: PS1.3 CS3.1
9. ANS: A PTS: 1 DIF: B OBJ: 2/2
STA: PS2.1 CS3.1
10. ANS: A PTS: 1 DIF: B OBJ: 2/4
STA: PS1.3 CS3.1
11. ANS: A PTS: 1 DIF: B OBJ: 1/4
STA: PS2.1 CS3.1
12. ANS: A PTS: 1 DIF: B OBJ: 3/3
STA: PS2.1 CS3.1
13. ANS: A PTS: 1 DIF: B OBJ: 2/2
STA: PS2.1 CS3.1
14. ANS: A PTS: 1 DIF: B OBJ: 3/4
STA: PS1.3 CS3.1
15. ANS: D PTS: 1 DIF: B OBJ: 1/1
STA: PS1.3 CS3.1
16. ANS: D PTS: 1 DIF: B OBJ: 3/4
STA: PS2.1 CS3.1
17. ANS: C PTS: 1 DIF: B OBJ: 3/3
STA: PS2.1 CS3.1
18. ANS: D PTS: 1 DIF: B OBJ: 1/1
STA: PS2.1 CS3.1
19. ANS: A PTS: 1 DIF: B OBJ: 3/3
STA: PS2.1 CS3.1
20. ANS: C PTS: 1 DIF: B OBJ: 1/1
STA: PS2.1 CS3.1
21. ANS: C PTS: 1 DIF: B OBJ: 1/2
STA: PS2.1 CS3.1
22. ANS: A PTS: 1 DIF: B OBJ: 2/3
STA: PS2.1 CS3.1
23. ANS: B PTS: 1 DIF: B OBJ: 2/4
STA: PS2.1 CS3.1
24. ANS: D PTS: 1 DIF: B OBJ: 3/4
STA: PS2.1 CS3.1
25. ANS: C PTS: 1 DIF: B OBJ: 2/4
STA: PS2.1 CS3.1
26. ANS: D PTS: 1 DIF: B OBJ: 3/2
STA: PS2.1 CS3.1
27. ANS: D PTS: 1 DIF: B OBJ: 3/4
STA: PS2.1 CS3.1
28. ANS: A PTS: 1 DIF: B OBJ: 3/1
STA: PS2.1 CS3.1
29. ANS: B PTS: 1 DIF: B OBJ: 1/4
STA: PS2.1 CS3.1
30. ANS: A PTS: 1 DIF: B OBJ: 2/3
STA: PS2.1 CS3.1
31. ANS: C PTS: 1 DIF: B OBJ: 3/4
STA: PS2.1 CS3.1
32. ANS: B PTS: 1 DIF: B OBJ: 3/4
STA: PS1.3 CS3.1
33. ANS: B PTS: 1 DIF: B OBJ: 3/3
STA: PS2.1 CS3.1
34. ANS: C PTS: 1 DIF: B OBJ: 1/1
STA: PS2.1 CS3.1
35. ANS: D PTS: 1 DIF: B OBJ: 3/4
STA: PS2.1 CS3.1
MATCHING
36. ANS: E PTS: 1 DIF: B OBJ: 1/4
STA: PS2.1 CS3.1
37. ANS: B PTS: 1 DIF: B OBJ: 1/3
STA: PS2.1 CS3.1
38. ANS: A PTS: 1 DIF: B OBJ: 1/3
STA: PS2.1 CS3.1
39. ANS: C PTS: 1 DIF: B OBJ: 3/2
STA: PS2.1 CS3.1
40. ANS: D PTS: 1 DIF: B OBJ: 3/2
STA: PS2.1 CS3.1
TRUE/FALSE
41. ANS: F PTS: 1
42. ANS: F PTS: 1
43. ANS: F PTS: 1
44. ANS: F PTS: 1
45. ANS: T PTS: 1
46. ANS: T PTS: 1
47. ANS: T PTS: 1
48. ANS: F PTS: 1
49. ANS: F PTS: 1
50. ANS: F PTS: 1
51. ANS: F PTS: 1
52. ANS: T PTS: 1
53. ANS: T PTS: 1 DIF: B OBJ: 1/2
STA: PS2.1 CS3.1
54. ANS: F PTS: 1 DIF: B OBJ: 2/2
STA: PS2.1 CS3.1
55. ANS: F PTS: 1 DIF: B OBJ: 2/4
STA: PS2.1 CS3.1
56. ANS: T PTS: 1 DIF: B OBJ: 2/2
STA: PS2.1 CS3.1
57. ANS: F PTS: 1 DIF: B OBJ: 3/3
STA: PS2.1 CS3.1
58. ANS: T PTS: 1 DIF: B OBJ: 1/2
STA: PS2.1 CS3.1