Physics Principles and Problems 2009

Section 24.1 : Magnets: Permanent and Temporary

Self-Check Quizzes

1
If you break a magnet in two unequal parts, what will result?
A)The result will be two magnets, each with one magnetic pole.
B)The result will be two pieces of metal that have lost their magnetic properties.
C)The result will be two magnets each with two opposite magnetic poles.
D)The larger piece will retain the magnetism, but the smaller one will not.
2
What does the magnetic flux per unit area indicate?
A)the strength of a magnetic field
B)the direction of iron filings in a magnetic field
C)the center of a magnet
D)where the north pole of a magnet is
3
A wire with current running through it forms a _____.
A)solenoid
B)magnetic field
C)right-hand field
D)closed circuit
4
In an induced magnet, the _____ are aligned.
A)electric currents
B)magnetic domains
C)electrons
D)iron filings
5
In magnetic recording media, _____ signals are stored as specifically oriented magnetic domains.
A)radio
B)video
C)audio
D)electrical
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