Download Chapter 34 Practice Test

Chapter 34 Practice Test
Multiple Choice
Identify the choice that best completes the statement or answers the question.
____
1. In order for there to be a flow of charge from one place to another, there must be a
a. conductor, such as a wire, connecting the two places.
b. potential difference between the two places.
c. Both A and B above
____
2. In solid conductors, electric current is the flow of
a. positive and negative charges.
b. electrons.
c. negative ions.
d. protons.
e. none of the above
____
3. Electrons move in an electric circuit
a. by being bumped by other electrons.
b. by interacting with an established electric field.
c. by colliding with molecules.
d. because the wires are so thin.
e. none of the above
____
4. An ampere is a
a. unit of resistance.
b. unit of current.
c. type of charge.
d. voltage.
e. current.
____
5. An example of a voltage source is
a. a dry cell.
b. a generator.
c. a car battery.
d. rubbing a rubber rod with fur.
e. all of the above
____
6. Electrical resistance in a wire depends on the wire's
a. thickness.
b. conductivity.
c. length.
d. all of the above
e. none of the above
____
7. Compared to thin wires, electrical resistance in thick wires is
a. less.
b. the same.
c. greater.
____
8. A pulsating electric field can travel through a wire at a speed of
a. less than 1 cm/s.
b. about 100 cm/s.
c. the speed of sound waves in metal.
d. nearly the speed of light.
____
9. The primary reason a bird can perch harmlessly on bare high voltage wires is that
a. a bird's feet are close together.
b. a bird has a very large electrical resistance.
c. there is no potential difference across the bird's feet.
d. all of the above
____ 10. Alternating current is made by
a. alternating current and voltage.
b. alternating the direction of voltage of the power source.
c. huge chemical batteries.
d. none of the above
____ 11. The frequency of AC current in North America is
a. 120 V.
b. 50 hertz.
c. 30 V.
d. 60 hertz.
True/False
Indicate whether the statement is true or false.
____ 12. When you turn on a light, electrons move at speeds near the speed of light in order to light up the light bulb.
____ 13. Charge will move in a conductor when there is a difference in potential between the ends of the conductor.
____ 14. The unit of electric current is the ampere.
____ 15. A voltage source is something that separates charges in a useful way.
____ 16. You can feel a slight shock from a 12-volt battery if your skin is moist.
____ 17. You should never work with plugged-in electrical appliances while standing in water.
____ 18. When charge moves in a circuit, it normally heats part of the circuit.
Chapter 34 Practice Quiz
Answer Section
MULTIPLE CHOICE
1. ANS:
STA:
2. ANS:
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3. ANS:
OBJ:
KEY:
4. ANS:
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5. ANS:
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6. ANS:
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7. ANS:
STA:
8. ANS:
OBJ:
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9. ANS:
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10. ANS:
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KEY:
11. ANS:
OBJ:
KEY:
C
PTS: 1
DIF: L2
OBJ:
IP.5.2| IP.5.3 KEY: flow | charge
BLM:
B
PTS: 1
DIF: L1
OBJ:
IP.5.2| IP.5.3 KEY: conductor | solid | electrons
BLM:
B
PTS: 1
DIF: L2
34.9 The Speed of Electrons in a Circuit
STA:
electrons | circuit
BLM: comprehension
B
PTS: 1
DIF: L1
OBJ:
IP.5.2| IP.5.3 KEY: ampere | unit
BLM:
E
PTS: 1
DIF: L2
OBJ:
IP.2.2| IP.5.2 KEY: voltage
BLM: comprehension
D
PTS: 1
DIF: L2
OBJ:
IP.5.2
KEY: resistance | length
BLM:
A
PTS: 1
DIF: L2
OBJ:
IP.5.2
KEY: wire | thick | thin
BLM:
C
PTS: 1
DIF: L1
34.9 The Speed of Electrons in a Circuit
STA:
pulsating | field | sound
BLM: knowledge
C
PTS: 1
DIF: L2
OBJ:
IP.5.2
KEY: potential | bird | wire
BLM:
B
PTS: 1
DIF: L1
34.7 Direct Current and Alternating Current
STA:
current | alternating
BLM: knowledge
D
PTS: 1
DIF: L1
34.7 Direct Current and Alternating Current
STA:
AC | frequency
BLM: knowledge
34.1 Flow of Charge
comprehension
34.2 Electric Current
knowledge
IP.5.2| IP.5.3
34.2 Electric Current
knowledge
34.3 Voltage Sources
34.4 Electric Resistance
comprehension
34.4 Electric Resistance
comprehension
IP.5.2| IP.5.3
34.6 Ohm's Law and Electric Shock
comprehension
IP.5.2
IP.5.2
TRUE/FALSE
12. ANS:
OBJ:
KEY:
13. ANS:
STA:
14. ANS:
STA:
15. ANS:
STA:
16. ANS:
STA:
17. ANS:
STA:
F
PTS: 1
DIF:
34.9 The Speed of Electrons in a Circuit
electrons | light
BLM:
T
PTS: 1
DIF:
IP.2.2| IP.5.2 KEY: charge | potential
T
PTS: 1
DIF:
IP.5.2| IP.5.3 KEY: unit | current BLM:
T
PTS: 1
DIF:
IP.2.2| IP.5.2 KEY: voltage | charge
T
PTS: 1
DIF:
IP.5.2
KEY: shock | wet | skin
T
PTS: 1
DIF:
IP.5.2
KEY: water | electricity
L2
STA:
comprehension
L1
OBJ:
BLM:
L1
OBJ:
knowledge
L1
OBJ:
BLM:
L2
OBJ:
BLM:
L1
OBJ:
BLM:
IP.5.2| IP.5.3
34.3 Voltage Sources
knowledge
34.2 Electric Current
34.3 Voltage Sources
knowledge
34.6 Ohm's Law and Electric Shock
comprehension
34.6 Ohm's Law and Electric Shock
knowledge
18. ANS: T
STA: IP.5.2
PTS: 1
DIF: L2
OBJ: 34.4 Electric Resistance
KEY: charge | heat BLM: comprehension