Electromagnetic Field Theory MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Electromagnetic Field Theory, a fundamental topic in the field of Electronics and Communication Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Electromagnetic Field Theory MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Electromagnetic Field Theory mcq questions that explore various aspects of Electromagnetic Field Theory problems. Each MCQ is crafted to challenge your understanding of Electromagnetic Field Theory principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Electronics and Communication Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Electromagnetic Field Theory MCQs are your pathway to success in mastering this essential Electronics and Communication Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Electromagnetic Field Theory. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Electromagnetic Field Theory knowledge to the test? Let's get started with our carefully curated MCQs!

Electromagnetic Field Theory MCQs | Page 8 of 63

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Q71.
A wave is propagated in a waveguide at frequency of 9 GHz and separation is 2 cm between walls calculate the phase velocity for dominant mode.

a.

3 x 10โธ m/sec

b.

5 x 10โธ m/sec

c.

1.5 x 10โธ m/sec

d.

9 x 10โธ m/sec

Discuss
Answer: (b).5 x 10โธ m/sec
Q72.
A plane electromagnetic wave travels in dielectric medium of relative permittivity 9. Relative to free space, the velocity of propagation in the dielectric is

a.

increased by a factor of 9

b.

increased by a factor of 3

c.

unchanged

d.

reduced by a factor of 1/3

Discuss
Answer: (d).reduced by a factor of 1/3
Q73.
Calculate the wave impedance for TM mode in rectangular waveguide for dominant mode at 3 GHz having

a.

(120ฯ€) ฮฉ

b.

377 ฮฉ

c.

226 ฮฉ

d.

629 ฮฉ

Discuss
Answer: (c).226 ฮฉ
Q74.
The divergence of the electric field intensity at any point equals

a.

1/4 ฯ€ฮตโ‚€ times the volume charge density

b.

l/ฮตโ‚€ times the volume charge density at that point

c.

ฮตโ‚€ times the volume charge density at that point

d.

the volume charge density at that point

Discuss
Answer: (b).l/ฮตโ‚€ times the volume charge density at that point
Q75.
For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the value of propagation constant P will be

a.

15.9 radians/km

b.

31.8 radians/km

c.

63.6 radians/km

d.

105.4 radians/km

Discuss
Answer: (a).15.9 radians/km
Q76.
Divergence theorem relate surface integration with volume integration as

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q77.
In figure the current distribution is represented by

a.

curve A

b.

curve B

c.

curve C

d.

curve D

Discuss
Answer: (c).curve C
Q78.
Given the following equation, if the radiation intensity of an antenna is proportional to sin² ฮธ, where ฮธ is the elevation angle, the antenna directivity will be

a.

8/3ฯ€

b.

16/3ฯ€

c.

4ฯ€/3

d.

3ฯ€/8

Discuss
Answer: (d).3ฯ€/8
Q79.
The radiation pattern of helical antenna (axial mode) is represented by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q80.
Antenna aperture efficiency is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
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