Electromagnetics [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 48 - 52 of 96

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Question 48

Electromagnetics
Equations

Question

MCQ▾

For a rectangular waveguide of internal dimensions , the cut – off frequency for the mode is the arithmetic mean of the cut – off frequencies for mode and mode. If . the value of is … .

Choices

Choice (4)Response

a.

3 cm

b.

4 cm

c.

2 cm

d.

All of the above

Question 49

Electromagnetics
Equations

Question

MCQ▾

Consider an air – filled rectangular waveguide with dimensions and . At operating frequency, the value of the propagation constant (per meter) of the corresponding propagation mode is ________

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question 50

Electromagnetics
Equations

Question

MCQ▾

The magnetic field along the propagation direction inside a rectangular waveguide with the cross section shown in the figure is

The phase velocity of the wave inside the waveguide satisfies

Choices

Choice (4)Response

a.

b.

c.

d.

Question 51

Electromagnetics
Equations

Question

MCQ▾

A rectangular metal wave guide filled with a dielectric material of relative permittivity has the inside dimensions . The cut off frequency for the dominant mode is

Choices

Choice (4)Response

a.

b.

c.

d.

Question 52

Electromagnetics
Equations

Question

MCQ▾

Consider an air – filled rectangular waveguide with dimensions and . The increasing order of the cut – off frequency for different modes is

Choices

Choice (4)Response

a.

b.

c.

d.

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