a.
emitter and collector of N-type material, and the base of P-type
material.
b.
emitter and base of N-type material, and the collector of P-type
material.
c.
collector and base of P-type material, and the emitter of N-type
material.
d.
base and emitter of P-type material, and the collector of N-type
material.
17. For the transistor symbol shown below, identify the type of transistor
and the element at each pin number.
a.
NPN - 1 collector, 2 base, 3 emitter
b.
NPN - 1 base, 2 collector, 3 emitter
c.
PNP - 1 collector, 2 base, 3 emitter
d.
PNP - 1 emitter, 2 base, 3 collector
18. If there are 30 dc pulses per second in the output of an unfiltered half-
would produce
a.
15 pulses per second.
c.
60 pulses per second.
b.
30 pulses per second.
d.
120 pulses per second.
19. The circuit shown in B of figure 1-9 develops the audio frequency (AF)
from the intermediate frequency (IF) carrier by
a.
rectification only.
c.
filtering only.
b.
rectification and filtering.
d.
amplification and filtering.
20. What happens when the breakdown voltage is exceeded in a zener diode?
a.
The diode
current
rapidly
increases,
while
the
remains
constant.
b.
The diode separates the audio signal from the RF carrier.
c.
The diode operates as a variable capacitance.
d.
The current stops flowing through the diode.
CHECK YOUR ANSWERS WITH LESSON SOLUTION SHEET (Page 73).
309 L1
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