The attenuation characteristics of a loaded line is similar to that of low pass

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Question
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

Correct Answer

band stop filter

Microwave Communication problems

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1. For air filled circular waveguides
Options
A. the attenuation due to imperfect conducting walls is negligible
B. the attenuation due to imperfect dielectric is negligible
C. both the attenuation i.e. due to imperfect conducting walls and due to imperfect dielectric are significant
D. the total attenuation is almost zero

2. Consider the following statements about instrument landing system of aircraft
1. It ensures correct landing under conditions of low visibility.
2. It consists of runaway localizer, glide path equipment and marker beacons.
3. It is basically a blind landing system.
Which of above statements are correct?
Options
A. All
B. 1 and 2 only
C. 1 and 3 only
D. 2 only

3. As regards rectangular and circular waveguides
Options
A. both have infinite set of TE and TM modes
B. rectangular waveguide has infinite TE and TM modes but not the circular waveguide
C. circular waveguide has infinite TE and TM modes but not the rectangular waveguide
D. none of the above

5. Which one of the following is true for EM wave propagation through rectangular waveguide of cross-section 2a x a
Options
A. critical wavelength for TE₁₀ mode is the same as that for TE₀₂ mode
B. critical wavelength for TE₁₀ mode is one half of that for TE₁₀ mode
C. critical wavelength for TE₁₀ mode is the same as that for TM₁₀ mode
D. critical wavelength for TE₁₀ mode is double that for TE₀₁mode

9. 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

10. 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

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