Discussion
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- Question
The main advantage of TWT over klystron is
Options- A. higher bandwidth
- B. higher gain
- C. higher frequency
- D. higher output
- Correct Answer
- higher bandwidth
- 1. VTM stands for voltage tunable magnetron.
Options- A. True
- B. False Discuss
- 2. 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 Discuss
- 3. Most electromagnetic transmission in rectangular wave-guide uses
Options- A. TE10 mode
- B. TE01 mode
- C. TE20 mode
- D. TE11 mode Discuss
- 4. 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 z0 Discuss
- 5. Radar reciever has high sensitivity and low noise figure
Options- A. True
- B. False Discuss
- 6. Fields are said to be circularly polarized if
Options- A. their magnitudes are equal
- B. their magnitudes are equal and they differ in phase by ± 90°
- C. their magnitudes are unequal and they differ in phase ± 90°
- D. their magnitudes are unequal and they are in phase Discuss
- 7. The frequency of oscillations obtained from a reflex klystron depends mainly on
Options- A. resonant frequency of cavity
- B. repeller voltage
- C. voltage of focussing electrode
- D. characteristics of cathode Discuss
- 8. Assertion (A): Two equal and opposite travelling waves result in a standing wave.
Reason (R): The ratio of maximum to minimum value of a standing wave is called SWR.
Options- A. Both A and R are correct and R is correct explanation of A
- B. Both A and R are correct but R is not correct explanation of A
- C. A is correct but R is wrong
- D. A is wrong but R is correct Discuss
- 9. In TE and TM modes of rectangular waveguides having propagation in z direction
Options- A. Ez and Hz are both zero
- B. In TE mode Ez is zero and in TM mode Hz is zero
- C. In TE mode Hz is zero and in TM mode Ez is zero
- D. In both TE and TM modes both Ez and Hz are non-zero Discuss
- 10. Assertion (A): In circular waveguide the attenuation of TE01 mode decreases as the operating frequency increases.
Reason (R): The wall currents in a circular waveguide in TEQ1 mode are completely circumferential.
Options- A. Both A and R are correct and R is correct explanation of A
- B. Both A and R are correct but R is not correct explanation of A
- C. A is correct but R is wrong
- D. A is wrong but R is correct Discuss
Microwave Communication problems
Search Results
Correct Answer: True
Correct Answer: zero
Correct Answer: TE10 mode
Correct Answer: a line terminated in z0
Correct Answer: True
Correct Answer: their magnitudes are equal and they differ in phase by ± 90°
Correct Answer: resonant frequency of cavity
Correct Answer: Both A and R are correct but R is not correct explanation of A
Correct Answer: In TE mode Ez is zero and in TM mode Hz is zero
Correct Answer: Both A and R are correct but R is not correct explanation of A
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