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chp 13 & 14 Exam Review

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

 

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