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Electronics and Communication Engineering
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Microwave Communication
Comments
Question
Which mode is called dominant mode in rectangular wave guide?
Options
A. TE
01
B. TE
11
C. TE
10
D. TE
20
Correct Answer
TE
10
Microwave Communication problems
Search Results
1. The electrical requirement on wall thickness of rectangular wave guide is
Options
A. wall thickness is more than skin depth
B. wall thickness is less than skin depth
C. wall thickness is equal to skin depth
D. either (b) or (c)
Show Answer
Scratch Pad
Discuss
Correct Answer: wall thickness is more than skin depth
2. Which of the following modes in circular waveguides are circularly symmetric?
Options
A. TE
01
B. TE
02
C. both (a) and (b)
D. neither (a) nor (b)
Show Answer
Scratch Pad
Discuss
Correct Answer: both (a) and (b)
3. Klystron amplifier is not used to amplifier very weak microwave signals due to
Options
A. low gain for weak signals
B. low noise for weak signals
C. high noise
D. both (a) and (b)
Show Answer
Scratch Pad
Discuss
Correct Answer: high noise
4. In fibre optics the use is made of thin glass fibres for efficient transmission of light.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
5. An electromagnetic wave can be completely guided by a dielectric rod or slab.
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
6. Radar reciever has high sensitivity and low noise figure
Options
A. True
B. False
Show Answer
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Discuss
Correct Answer: True
7. Which of the following lines behaves as infinite line?
Options
A. a line terminated in inductance
B. a line terminated in capacitance
C. a short line
D. a line terminated in
z
0
Show Answer
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Discuss
Correct Answer: a line terminated in
z
0
8. Most electromagnetic transmission in rectangular wave-guide uses
Options
A. TE
10
mode
B. TE
01
mode
C. TE
20
mode
D. TE
11
mode
Show Answer
Scratch Pad
Discuss
Correct Answer: TE
10
mode
9. A line of characteristic impedance 400 ? is terminated by a resistance of 400 ?. The reflected quantities are
Options
A. zero
B. equal to incident quantities
C. half the incident quantities
D. double the incident quantities
Show Answer
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Discuss
Correct Answer: zero
10. VTM stands for voltage tunable magnetron.
Options
A. True
B. False
Show Answer
Scratch Pad
Discuss
Correct Answer: True
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