LESSON 1
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
A.
Induction field
field. (page 1-5, para 2b(1))
2.
C.
Spectrum
The term spectrum is used to designate the entire range of electromagnetic waves
arranged in the order of their frequencies. (page 1-5, para 2)
3.
A.
Amplitude
The height of a wave crest above the reference line is called the amplitude of the
wave. (page 1-5, para 1h)
4.
D.
Cycle
The combination of one complete positive and one complete negative alternation
represents one cycle of waves. (page 1-4, para le2))
5.
C.
A wavelength is the distance in space occupied by one cycle of a radio wave for a
given period of time. (page 14, para 1f)
6.
A.
It is refracted
When a wave passes from one medium into a medium that has a different
propagation velocity, a change in the direction of the wave will occur. This
changing of direction is called refraction. (page 1-12, para 4c)
SS0130
1-18
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