RAD 121 Magnetism Practice Exams

RAD 121: Magnetism
Study online at https://quizlet.com/_fuif1x

1. Which of the following is the ability of cer- A. Magnetism
tain materials to attract substances such
as iron, cobalt, or nickel?
A. Magnetism
B. Electromagnetism
C. Retentivity
D. Permeability

2. Which of the following is any substance B. Magnet
that attracts other substances such as
iron, cobalt, or nickel?
A. Electromagnet
B. Magnet
C. Magnetic flux
D. Compass

3. Which of the following is a natural-earth C. Lodestone
magnet?
A. Horseshoe magnet
B. Bar magnet
C. Lodestone
D. All of the above

4. Which of the following is NOT an artificial D. Lodestone
magnet?
A. Horseshoe
B. Bar
C. Ring
D. Lodestone

5. Which of the following is a piece of soft A. Electromagnet
iron that becomes a strong magnet when
an electric current is passed through the
wire coil wrapped around it?
A. Electromagnet
B. Magnet
C. Compass
D. Circuit




, RAD 121: Magnetism
Study online at https://quizlet.com/_fuif1x
6. True or False: False
All magnets, except those in the shape of All magnets have north and
a sphere, have a north and south pole. south

7. Like poles ______, unlike poles ______. repel, attract

8. The force of attraction or repulsion is A. Directly; inversely squared
_____ proportional to the strength, and
_____ proportional to the distance.
A. Directly; inversely squared
B. Inversely squared; directly
C. Inversely; directly
D. Directly; inversely

9. True or False: True
Breaking a magnet results in magnetic
fragments.

10. What happens to steel if it is heated or B. The steel becomes magne-
hammered near a magnet? tized
A. The magnet becomes demagnetized
B. The steel becomes magnetized
C. The magnet would be drawn to the steel
D. Nothing would happen since they are
not touching

11. Stroking and iron bar with a magnet does C. Magnetizes the iron bar
what?
A. Removes the magnetism from the mag-
net
B. Causes the iron bar to heat up
C. Magnetizes the iron bar
D. Increases the magnetism of the magnet

12. If you were to fill a test tube with iron D. The iron would become mag-
filings and shake that tube near a magnet, netized
what would occur?
A. The magnetic pull on the filings would
cause the tube to break
B. The iron would pull the magnetism out


, RAD 121: Magnetism
Study online at https://quizlet.com/_fuif1x
of the magnet
C. The magnetism of the magnet would be
increased
D. The iron would become magnetized

13. True or False: True
Atomic magnets make up magnetic mate-
rial.

14. Domains exist in a ________ or _______ C. Magnetized or non-magne-
state. tized
A. North or south
B. Positive or negative
C. Magnetized or non-magnetized
D. Atomic or subatomic

15. Domains in a ________ state are arranged B. Non-magnetized
in random disorder.
A. Magnetized
B. Non-magnetized
C. Both a and b
D. None of the above

16. Domains in a ________ state are aligned in A. Magnetized
order.
A. Magnetized
B. Non-magnetized
C. Both a and b
D. None of the above

17. True or False: False
Nonmagnetic materials have domains in a No magnetic materials do not
non-magnetized state. have domains

18. True or False: False
Non-magnetic materials do not have They don't have domains so
domains, but can become magnetized therefore cannot become mag-
through certain processes. netized.

19. C. Magnetic field