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# Electricity - Basic Navy Training CoursesChapter 2 QuizNAVPERS 10548

Here is the "Electrician's Mate 3 - Navy Training Courses" (NAVPERS 10548) in its entirety (or will be eventually). It should provide one of the Internet's best resources for people seeking a basic electricity course - complete with examples worked out. See copyright. See Table of Contents.

U.S. GOVERNMENT PRINTING OFFICE; 1949

CHAPTER 2 QUIZ

MAGNETISM

1. What other materials besides iron show magnetic properties?

2. What materials have stronger magnetic properties than iron?

3. Name three nonmagnetic materials.

4. How do nonmagnetic materials differ from nonconductors of electricity?

5. If you have a magnetic material that is not magnetized, name two ways in which a
magnet could be used to produce magnetism in it.

6. Complete the following sentences:
a. Magnets act as if magnetic lines of _________ existed between poles.
b. The space in which magnetic lines are present is called the magnetic _________.
c. The magnetic lines through a particular area comprise the magnetic _________.
d. The path magnetic lines follow is called a magnetic _________.

7. Complete the following sentences:
a. Flux density indicates the _________ of a magnetic field.
b. Flux density is expressed in _________ per square inch.
c. The unit of flux density is the _________.

8. Complete the following sentences:
a. Magnets attract magnetic materials because magnetic lines tend to
_________ themselves.
b. Magnetic shielding is difficult because magnetic lines pass through
_________ materials.
c. An instrument can be partly shielded from magnetic fields by a housing of magnetic
materials because magnetic lines pass through magnetic materials _________.
d. Magnets repel each other because magnetic lines flowing in the same direction
tend to _________ each other.
e. Magnetic lines never _________.
f. Each magnetic line forms a complete _________.
g. Like magnetic poles will _________ each other.
h. Unlike magnetic poles _________ each other.
i. The force of attraction between magnets is _________ proportional to the pole
strength of the magnets.
j. The force of attraction or repulsion between magnets is _________ proportional to
the square of the distance between them.

9. How does the arrangement of electrons within the atom differ between magnetic
and nonmagnetic materials?

10. What does a magnetizing force do to the molecular magnets of a magnetic material?

11. According to the molecular theory of magnetism, why is hard steel more difficult to
magnetize then soft iron?

12. Instruments using permanent magnets should not be jarred, hammered, or heated
because jarring, hammering and heat do what to the permanent magnet?

/13. Using a magnetic compass, how would you detect if a magnetic material is magnetized?