GATE ECE (Electronics) Test: Waveguides Free Online Test 2026
MCQ Practice Test & Solutions: Test: Waveguides (20 Questions)
You can prepare effectively for Electronics and Communication Engineering (ECE) GATE ECE (Electronics) Mock Test Series 2027 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Waveguides ". These 20 questions have been designed by the experts with the latest curriculum of Electronics and Communication Engineering (ECE) 2026, to help you master the concept.
Test Highlights:
- - Format: Multiple Choice Questions (MCQ)
- - Duration: 60 minutes
- - Number of Questions: 20
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Consider a 150 m long air-filled hollow rectangular wave guide with cutoff frequency 6.5 GHz. If a shortpulse of 7.2 GHz is introduced into the input end of theguide, the time taken by the pulse to return the inputend is
Detailed Solution: Question 1
In an air-filled rectangular waveguide the cutoff frequencies for TM11 and TE03 modes are both equal to 12 GHz.
Que: The dominant mode is
Detailed Solution: Question 2
In an air-filled rectangular waveguide the cutoff frequencies for TM11 and TE03 modes are both equal to 12 GHz.
Que:At dominant mode the cutoff frequency is
Detailed Solution: Question 3
For an air-filled rectangular waveguide given that
If the waveguide has cross-sectional dimension a = 6 cm and b = 3 cm, then the intrinsic impedance of this mode is
Detailed Solution: Question 4
In an air-filled waveguide, a TE mode operating at 6 GHz has
Que: The cutoff frequency is
Detailed Solution: Question 5
In an air-filled waveguide, a TE mode operating at 6 GHz has
Que: The intrinsic impedance is
Detailed Solution: Question 6
Consider an air-filled rectangular wave guide with a = 2.286 cm and b = 1.016 cm. The y-component of the TE mode is
Que: The propagation constant γ is
Detailed Solution: Question 7
Consider an air-filled rectangular wave guide with a = 2.286 cm and b = 1.016 cm. The y-component of the TE mode is
Que: The intrinsic impedance is
Detailed Solution: Question 8
Consider a air-filled waveguide operating in the TE12 mode at a frequency 20% higher than the cutoff frequency.
Que: The phase velocity is
Detailed Solution: Question 9
Consider a air-filled waveguide operating in the TE12 mode at a frequency 20% higher than the cutoff frequency.
Que: The group velocity is
Detailed Solution: Question 10
A rectangular waveguide is filled with a polyethylene ( εr = 2.25 ) and operates at 24 GHz. The cutoff frequency of a certain mode is 16 GHz. The intrinsic impedance of this mode is
Detailed Solution: Question 11
own in fig. It has dielectric discontinuity as shown in fig. If the guide operate at 8 GHz in the dominant mode, the standing wave ratio is
Detailed Solution: Question 12
Consider the rectangular cavity as shown in fig.
Que: If a < b < c, the dominant mode is
Detailed Solution: Question 13
Consider the rectangular cavity as shown in fig.
Que: If a > b > c, then the dominant mode is
Detailed Solution: Question 14
Consider the rectangular cavity as shown in fig.
Que: If a = c > b, then the dominant mode is
Detailed Solution: Question 15
The air filled cavity resonator has dimension a = 3 cm, b = 2 cm, c = 4 cm. The resonant frequency for the TM110 mode is
Detailed Solution: Question 16
A 6 cm x 4 cm rectangular wave guide is filled with dielectric of refractive index 1.25
Que: The range of frequencies over which single mode operation will occur is
Detailed Solution: Question 17
A 6 cm x 4 cm rectangular wave guide is filled with dielectric of refractive index 1.25
Que: The range of frequencies, over which guide support both TE10 and TE01 modes and no other, is
Detailed Solution: Question 18
Two identical rectangular waveguide are joined end to end where a = 2b. One guide is air filled and other is filled with a lossless dielectric of εr. it is found that up to a certain frequency single mode operation can be simultaneously ensured in both guide. For this frequency range, the maximum allowable value of εr is
Detailed Solution: Question 19
A parallel-plate guide operates in the TEM mode only over the frequency range 0 < f < 3 GHz. The dielectric between the plates is teflon (εr = 2.1) .The maximum allowable plate separation b is
Detailed Solution: Question 20
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