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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 19
41.
In a pulsed RADAR, the transmitter is connected to the antenna
during pulse interval
during interval between pulses
all the time
only during a fraction of pulse interval
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
In a CD, the depth and width of each pit is
0.5 μm each
0.5 μm and 1 mm respectively
1 μm and 0.5 mm respectively
1 μm each
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Which type of modulator amplifier is used in AM transmitter?
Class A
Class B
Classes AB
Class C with negative feedback
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
A frequency multiplier stage should operate as
class A
class B
class AB
class C
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
A digital watch contains
quartz crystal oscillator
RC oscillator
LC oscillator
either quartz or RC oscillator
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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