Completion
Complete each
statement.
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Choose the best answer in parentheses.
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1.
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The magnetic field around a bar magnetic is ____________________
(strongest/weakest) at the magnetic poles.
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2.
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Materials such as iron are magnetic materials because they contain magnetic
____________________ (currents/domains).
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3.
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A permanent magnet is formed when all of the ____________________of a magnetic
material line up.
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4.
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A ____________________ converts mechanical energy into electrical energy using
the relative motion of a magnet and a wire loop.
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5.
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A compass needle points north because the Earth is surrounded by a
____________________.
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Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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6.
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The energy conversion in an electric generator is
a. | mechanical to electrical. | c. | chemical to
electrical. | b. | electrical to mechanical. | d. | electrical to chemical. |
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7.
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A stationary charged particle is surrounded by a(n)
a. | electric field. | c. | electric field and a magnetic field. | b. | magnetic
field. | d. | electric
current. |
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8.
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An electromagnet is a type of
a. | permanent magnet. | c. | generator. | b. | temporary magnet. | d. | parallel
circuit. |
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9.
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A copper wire is an example of a(n)
a. | electric circuit. | c. | insulator. | b. | magnetic material. | d. | conductor. |
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10.
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A group of iron atoms whose magnetic poles are oriented in the same direction
are a(n)
a. | electromagnet. | c. | magnetic domain. | b. | magnetic field. | d. | magnetic pole |
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11.
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If the distance between two charged objects increases, the electric force
between them _____.
a. | decreases | c. | remains the same | b. | increases | d. | stops |
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12.
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Which of the following is true about the magnetic field lines of a bar
magnet?
a. | They are closest together at the magnet’s poles. | b. | They are closest
together near the magnet’s center. | c. | They are closest together where the magnetic
field is weakest. | d. | They extend in a straight line from the
magnet’s center. |
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13.
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Each of the following elements is magnetic except _____.
a. | aluminum | c. | iron | b. | cobalt | d. | nickel |
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14.
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The magnetic fields of all the atoms in a magnetic domain _____.
a. | add together | c. | cause a chemical reaction | b. | cancel each other
out | d. | produce an electric
current |
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15.
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Which of the following occurs in a hydroelectric power plant?
a. | Electrical energy is used to move water. | b. | Kinetic energy is
converted into electrical energy. | c. | Kinetic energy causes a chemical reaction that
produces steam. | d. | Hot water causes a chemical reaction that generates electrical
energy. |
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16.
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Which of the following statements about the forces between charged objects is
not true?
a. | As the distance between charged objects decreases, the electric force between them
decreases. | b. | If one object is positively charged and another is negatively charged, the objects
will attract each other. | c. | Two negatively charged objects will repel each
other. | d. | Two positively charged objects will repel each other. |
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Short Answer
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17.
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Make a general statement about the relationship between electricity and
magnetism. Then, identify two facts that support your statement.
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18.
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How are a battery and an electric generator similar and how are they
different?
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19.
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In what way are electric fields and magnetic fields similar?
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Modified True/False
Indicate
whether the statement is true or false. If false, change the identified word or phrase to make the
statement true.
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20.
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Unlike magnetic poles repel each other. _________________________
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21.
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An electromagnet is a current-carrying wire wrapped around a copper core.
_________________________
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