Explore topic-wise MCQs in Microwave Engineering.

This section includes 28 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

The wave impedance for a non-propagating mode in TE mode is:

A. K/β
B. Imaginary
C. Zero
D. Non-existing
Answer» C. Zero
Discussion
2.

If the distance between the two plates of a parallel plate waveguide is 20 mm and is operating in TE₂ mode, then the cut off frequency of TE₂ mode is:

A. 20 MHz
B. 15 GHz
C. 5 GHz
D. None of the mentioned
Answer» C. 5 GHz
Discussion
3.

If in a parallel plate waveguide, PL=4 mW/m and Pₒ=10 mW/m, then what is the conduction loss?

A. 0.5
B. 0.4
C. 0.1
D. 0.2
Answer» E.
Discussion
4.

For a parallel plate waveguide, which of the following is true?

A. No real power flow occurs in the ‘z’ direction
B. Power flow occurs in ‘z’ direction
C. No power flow occurs in any direction
D. Wave propagation in z direction is not possible in any mode
Answer» B. Power flow occurs in ‘z’ direction
Discussion
5.

Phase velocity of the plane waves in the two direction in a parallel plate waveguide is:

A. 1/√(μ∈)secant θ
B. 1/√(μ∈)cosecant θ
C. 1/√(μ∈)tangent θ
D. 1/√(μ∈)cosine θ
Answer» B. 1/√(μ∈)cosecant θ
Discussion
6.

For a parallel waveguide, the dominant mode for TM propagation is:

A. TM0 mode
B. TM1 mode
C. TM2 mode
D. Dominant mode does not exist
Answer» C. TM2 mode
Discussion
7.

For TM2 mode, if the distance between two parallel plates of a waveguide are 40 mm, then the cut off wavelength for TM2 mode is:

A. 20 mm
B. 80 mm
C. 40 mm
D. 60 mm
Answer» D. 60 mm
Discussion
8.

In a parallel plate waveguide, for a propagating mode, the value of β is:

A. Real
B. Complex
C. Imaginary
D. Cannot be defined
Answer» B. Complex
Discussion
9.

The wave impedance of a TM mode in a parallel plate waveguide is a:

A. Function of frequency
B. Independent of frequency
C. Proportional to square of frequency
D. Inversely proportional to square of frequency
Answer» B. Independent of frequency
Discussion
10.

In TM mode, if the direction of wave propagation is in ‘z’ direction, then:

A. HZ=0
B. EZ=0
C. EY=0
D. HY=0
Answer» B. EZ=0
Discussion
11.

If the width of a parallel plate waveguide is 30 mm and the distance between the parallel pates is 5 mm, with an intrinsic impedance of 377Ω, then the characteristic impedance of the wave is:

A. 50 Ω
B. 62.833 Ω
C. 100 Ω
D. None of the mentioned
Answer» C. 100 Ω
Discussion
12.

The characteristic impedance of a parallel plate waveguide is given by:

A. η*D/W
B. η*W/D
C. D/ η*W
D. η*√(D/W)
Answer» B. η*W/D
Discussion
13.

The fringe effect can be neglected in a parallel plate waveguide is because of:

A. The dielectric material used
B. Width of the plates is greater than the distance between the plates
C. Material of the parallel plate waveguide used
D. None of the mentioned
Answer» C. Material of the parallel plate waveguide used
Discussion
14.

FOR_A_PARALLEL_WAVEGUIDE,_THE_DOMINANT_MODE_FOR_TM_PROPAGATION_IS:?$

A. TM0 mode
B. TM1 mode
C. TM2 mode
D. Dominant mode does not exist
Answer» C. TM2 mode
Discussion
15.

For a parallel plate waveguide, which of the following is true?$

A. No real power flow occurs in the ‘z’ direction
B. Power flow occurs in ‘z’ direction
C. No power flow occurs in any direction
D. Wave propagation in z direction is not possible in any mode
Answer» B. Power flow occurs in ‚Äö√Ñ√∂‚àö√ë‚àö‚â§z‚Äö√Ñ√∂‚àö√ë‚àö¬• direction
Discussion
16.

Phase_velocity_of_the_plane_waves_in_the_two_direction_in_a_parallel_plate_waveguide_is:$

A. 1/√(μ∈)secant θ
B. 1/√(μ∈)cosecant θ
C. 1/√(μ∈)tangent θ
D. 1/√(μ∈)cosine θ
Answer» B. 1/‚Äö√Ñ√∂‚àö‚Ć‚àö‚àÇ(‚âà√≠¬¨‚à´‚Äö√Ñ√∂‚àö‚Ć‚àö‚Ć)cosecant ‚âà√≠‚Äö√†√®
Discussion
17.

The wave impedance for a non-propagating mode in TE mode is:

A. K/β
B. Imaginary
C. Zero
D. Non-existing
Answer» C. Zero
Discussion
18.

If the distance between the two plates of a parallel plate waveguide is 20 mm and is operating in TE‚ÇÇ mode, then the cut off frequency of TE‚ÇÇ mode is:$

A. 20 MHz
B. 15 GHz
C. 5 GHz
D. None of the mentioned
Answer» C. 5 GHz
Discussion
19.

If in a parallel plate waveguide, PL=4 mW/m and P‚Çí=10 mW/m, then what is the conduction loss?$

A. 0.5
B. 0.4
C. 0.1
D. 0.2
Answer» E.
Discussion
20.

TE mode is characterized by:

A. E<sub>Z</sub>=0
B. H<sub>Z</sub>=0
C. E<sub>x</sub>=0
D. E<sub>y</sub>=0
Answer» B. H<sub>Z</sub>=0
Discussion
21.

For TM2 mode, if the distance between two parallel plates of a waveguide are 40 mm, then the cut off wavelength for TM2 mode is?

A. 20 mm
B. 80 mm
C. 40 mm
D. 60 mm
Answer» D. 60 mm
Discussion
22.

In a parallel plate waveguide, for a propagating mode, the value of β is:$

A. Real
B. Complex
C. Imaginary
D. Cannot be defined
Answer» B. Complex
Discussion
23.

The wave impedance of a TM mode in a parallel plate waveguide is a:

A. Function of frequency
B. Independent of frequency
C. Proportional to square of frequency
D. Inversely proportional to square of frequency
Answer» B. Independent of frequency
Discussion
24.

In TM mode, if the direction of wave propagation is in ‘z’ direction, then:$

A. H<sub>Z</sub>=0
B. E<sub>Z</sub>=0
C. E<sub>Y</sub>=0
D. H<sub>Y</sub>=0
Answer» B. E<sub>Z</sub>=0
Discussion
25.

If the width of a parallel plate waveguide is 30 mm and the distance between the parallel pates is 5 mm, with an intrinsic impedance of 377Ω, then the characteristic impedance of the wave is:$

A. 50 Ω
B. 62.833 Ω
C. 100 Ω
D. None of the mentioned
Answer» C. 100 ‚âà√≠¬¨¬©
Discussion
26.

The characteristic impedance of a parallel plate waveguide is given by:

A. η*D/W
B. η*W/D
C. D/ η*W
D. η*√(D/W)
Answer» B. ‚âà√≠‚Äö√†√´*W/D
Discussion
27.

The fringe effect can be neglected in a parallel plate waveguide is because of:

A. The dielectric material used
B. Width of the plates is greater than the distance between the plates
C. Material of the parallel plate waveguide used
D. None of the mentioned
Answer» C. Material of the parallel plate waveguide used
Discussion
28.

The modes of wave propagation that a parallel plate waveguide can support are:

A. TEM, TE, TM modes
B. TM, TE modes
C. TEM, TM modes
D. TEM, TE modes
Answer» B. TM, TE modes
Discussion