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Electronics and Communication Engineering - Communication Systems

Exercise : Communication Systems - Section 12
11.
Brownian motion is
random emission of electrons in vacuum tubes
thermal motion of electrons in a resistance
random diffusion of holes and electrons in semi- conductors
both (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
12.
In a TV studio the illuminance is about
200 lux
1000 lux
10000 lux
10 lux
Answer: Option
Explanation:
No answer description is available. Let's discuss.
13.
MEWS stands for
Missile Early Warning System
Moving Target Early warning System
Missile Early Warning Signal
Moving Target Early Warning Signal
Answer: Option
Explanation:
No answer description is available. Let's discuss.
14.
Top loading in an antenna increases
effective height
beam width
input capacitance
bandwidth
Answer: Option
Explanation:
No answer description is available. Let's discuss.
15.
In a radar, the return echo arrives after the allocated pulse interval. Then
the receiver may be over loaded
the target will appear closer than its actual position
the return echo may interfere with transmitter operation
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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