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- Question
A line slightly longer than
length and short circuited at far end behaves as
Options- A. an inductance
- B. a capacitance
- C. L and C in series
- D. L and C in parallel
- Correct Answer
- a capacitance
- 1. Microwaves are used for
Options- A. telephony
- B. radio broadcast
- C. TV systems
- D. all of the above Discuss
- 2. At a frequency equal to cutoff frequency in a rectangular wave guide
Options- A. the flow of electromagnetic energy is zero
- B. the flow of electromagnetic energy is infinite
- C. the flow of electromagnetic energy is 50% of maximum
- D. the flow of electromagnetic energy is 10% of maximum Discuss
- 3. A directional coupler is used
Options- A. to transmit microwave signals
- B. to generate microwave signals
- C. to measure amplitude and phase of a travelling wave
- D. both (a) and (b) Discuss
- 4. Consider the following statements about a magic tee
- The collinear arms are isolated from each other.
- On of the collinear arms is isolated from E arm.
- On of the collinear arms is isolated from H arm.
- E and H arms are isolated from each other.
Options- A. 1 and 2 are correct
- B. 1 and 3 are correct
- C. 1 and 4 are correct
- D. 2 and 3 are correct Discuss
- 5. As compared to LED, LASER has
- higher emission efficiency
- no tuning arrangement
- narrow spectral width
- provision for confinement
Options- A. 1, 2, 3 are correct
- B. 1, 2, 4 are correct
- C. 1 and 3 are correct
- D. 1, 3, 4 are correct Discuss
- 6. In a microwave resistor the wall thickness is made as small as possible to
Options- A. have high value of R
- B. have low value of R
- C. minimize capacitive effect
- D. reduce inductance Discuss
- 7. The beam of a radar should be
Options- A. very narrow
- B. very wide
- C. neither too narrow nor very wide
- D. either (b) or (c) Discuss
- 8. Which of the following modes cannot exist in rectangular resonant cavity?
Options- A. TE110
- B. TE011
- C. TM110
- D. TM111 Discuss
- 9. In a klystron amplifier the transit time of electron passing the gap in the cavity should be
Options- A. less than one cycle
- B. less than half cycle
- C. less than quarter cycle
- D. more than quarter cycle Discuss
- 10. Consider the following statements about hybrid ring
- Ports 1 and 2 are decoupled.
- Port 3 and 4 are coupled.
- A signal entering either port 1 or 2 splits equally between ports 3 and 4.
- A signal entering either port 3 or 4 splits equally between ports 1 and 2.
Options- A. 1, 2, 3 and 4
- B. 1, 3 and 4
- C. 1 and 2
- D. 2, 3 and 4 Discuss
Microwave Communication problems
Search Results
Correct Answer: all of the above
Correct Answer: the flow of electromagnetic energy is infinite
Correct Answer: to measure amplitude and phase of a travelling wave
Correct Answer: 1 and 4 are correct
Correct Answer: 1, 3, 4 are correct
Correct Answer: minimize capacitive effect
Correct Answer: very narrow
Correct Answer: TE110
Correct Answer: less than quarter cycle
Correct Answer: 1, 3 and 4
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