Discussion
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- Question
Assertion (A): In TE10 mode the cutoff frequency of rectangular waveguide is
where a is the broad dimension and c is velocity of light.Reason (R): TE10 mode is the dominant mode in rectangular waveguide.
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
- Correct Answer
- Both A and R are correct but R is not correct explanation of A
- 1. A TR (transmitter receiver) tube has
Options- A. low loss for low power signals and high
- B. high loss for low power signals and low loss for high level signal
- C. low loss for both low level and high level signals
- D. high loss for both low level and high level signals Discuss
- 2. A directional coupler is used to determine
Options- A. rv
- B. rv and VSWR
- C. L and C
- D. wave velocity Discuss
- 3. Radar is essentially an echo ranging system
Options- A. True
- B. False Discuss
- 4. In a microwave coaxial cable the inner conductor radius is a and inner radius of outside conductor is b. For TE11 mode the cut off wavelength is about
Options- A. a + b
- B. p(a + b)
- C. pa
- D. pb Discuss
- 5. The attenuation characteristics of a loaded line is similar to that of
Options- A. low pass filter
- B. high pass filter
- C. band pass filter
- D. band stop filter Discuss
- 6. Which mode has the minimum cutoff frequency in rectangular wave guides?
Options- A. TE11
- B. TE10
- C. TE01
- D. TE20 Discuss
- 7. The radiation resistance of a doublet antenna of length dl is proportional to
Options- A. ? l
- B. (? l)2
- C. (? l)3
- D. (? l)05 Discuss
- 8. Assertion (A): A small section of high impedance line is equivalent to a series inductance.
Reason (R): A small section of a low impedance line is equivalent to a series resistance.
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. When duct propagation exists
Options- A. the line of sight and diffraction. Zone concepts are payable
- B. the line of sight and diffraction zone concepts are not applicable
- C. line of sight concept is applicable but diffraction zone concept is applicable
- D. diffraction zone concept is not applicable but line of sight concept is not applicable Discuss
- 10. As compared to dimensions of most feeds, the skin depth at microwave frequencies is
Options- A. of the same magnitude
- B. much larger
- C. much smaller
- D. either (b) or (c) Discuss
Microwave Communication problems
Search Results
Correct Answer: low loss for low power signals and high
Correct Answer: rv and VSWR
Correct Answer: True
Correct Answer: p(a + b)
Correct Answer: band stop filter
Correct Answer: TE10
Correct Answer: (? l)2
Correct Answer: A is correct but R is wrong
Correct Answer: the line of sight and diffraction zone concepts are not applicable
Correct Answer: of the same magnitude
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