A.
B.
D.
C.
Figure 2-1.
Voltage and current relationships in a
grounded-grid amplifier.
12. When comparing radio communication with broadcasting or public address work,
the most important consideration must be the
a. intelligibility of speech.
b. sensitivity of the microphone.
c. resulting naturalness of speech.
d. maximum range of the transmitter.
13. Depending on the service for which they are designed, different types of
microphones have varying degrees of sensitivity. Which type of microphone has the
highest sensitivity?
a. Velocity
c. Crystal
b. Dynamic
d. Carbon
14. In the audio stages of a speech amplifier, which class of amplifier is
usually used when voltage gain is the objective?
a. AB
c. B
b. A
d. C
321 L2
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