What is the propagation constant for air filled wave guide with dimensions a = 1

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Question
What is the propagation constant for air filled wave guide with dimensions a = 1.59" and b = 0.795" at 4.95 GHz?
Options
A. 0.6698
B. 0.7698
C. 0.503
D. 0.6598

Correct Answer

0.6698

Explanation

What is the propagation constant for air filled wave guide with dimensions a = 1.59

Here, What is the propagation constant for air filled wave guide with dimensions a = 1.59

a = 1.59'' = 40.386 mm = 4.04 cm

? What is the propagation constant for air filled wave guide with dimensions a = 1.59 .

Exam Questions Papers problems

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1. When phase-lag compensation is used in a system, then gain cross over frequency, bandwidth and undamped frequency are respectively
Options
A. Increased, Increased, Increased
B. Increased, Increased, Decreased
C. Increased, Decreased, Decreased
D. Decreased, Decreased, Decreased

2. Consider a unity feedback control system with open-loop transfer function The steady state error of the system due to a unity step input is :
Options
A. zero
B. K
C. 1/K
D. infinite

3. Radiation resistance of an antenna is 54 ? and loss resistance is 6 ?. If antenna has power gain of 10, then directivity is:
Options
A. 9
B. 11.11
C. data not sufficient
D. 10

4. A noiseless 3 KHz channel can transmit binary at the rate __________ .
Options
A. 12000 bps
B. 10000 bps
C. 6000 bps
D. 3000 bps

5. A rectangular waveguide, in dominant TE mode, has dimensions 10 cm x 15 cm. The cut off frequency is
Options
A. 10 GHz
B. 1 GHz
C. 15 GHz
D. 25 GHz

6. The equivalent form of the logical expression ABC + A BC + ABC + ABC + AB C is
Options
A. C + (A ? B)
B. (A + B + C)(A + B + C)
C. (A + B + C)(A + B + C)(A + B + C)
D. (A + B + C)(A + B + C)(A + B + C)

7. An air-filled rectangular waveguide has dimensions 8cm x 10cm . The phase velocity of guided wave at frequency of 3 GHz for TE₁₀ mode is
Options
A. 1.5 x 10⁸ m/s
B. 5.5 x 10⁸ m/s
C. 3.46 x 10⁸ m/s
D. 0.18 x 10⁷ m/s

8. If x[n] then the sequence x[n] is
Options
A. non-periodic
B. periodic
C. depends on n
D. none of these

9. The impulse response and the excitation function of a linear time invariant causal system are shown in figure (a) and (b) respectively. The output of the system at t = 2 sec is equal to
Options
A. 0
B. 2
C.
D.

10. Consider the following
1. Maximum energy of electrons liberated photoelectrically is independent of light intensity
2. Maximum energy of electrons liberated photoelectrically varies nonlinearly with frequency of incident light.
Options
A. (1) is true and (2) is false
B. (1) and (2) both are true
C. (1) is false and (2) is true
D. (1) and (2) both are false

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