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 28 of 63

Discover more Topics under Electronics and Communication Engineering

Q271.
For space propagation, what will be the electric field strength at receiving antenna

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q272.
The fluctuation in the received signal strength at the receiver of a random variation in the received signal is known as

a.

fluctuation

b.

fading

c.

absorption

d.

cycling

Discuss
Answer: (b).fading
Q273.
The secondary lobes in binomial arrays can be reduced by

a.

maintaining spacing between two consecutive radiating sources less than ฮป/2

b.

maintaining the amplitudes in radiating sources, from outer towards the centre source, proportional to the coefficients of the successive terms of the binomial series

c.

both (a) and (b)

d.

none of the above

Discuss
Answer: (c).both (a) and (b)
Q274.
Which of the following statement is incorrect?

a.

Curl of vector potential is magnetic field density

b.

Electric charges in motion produce magnetic field

c.

Electric charges at rest produce electrostatic field

d.

None of the above

Discuss
Answer: (d).None of the above
Q275.
The maximum effective aperture of a microwave antenna which has a directivity of 900, will be

a.

71.619 ฮป²

b.

716.19 ฮป²

c.

7161.9 ฮป²

d.

71619 ฮป²

Discuss
Answer: (a).71.619 ฮป²
Q276.
For a wave propagating in air filled rectangular waveguide.

a.

guide wavelength is never less than free space wavelength.

b.

wave impedance is never less than the free space impedance

c.

TEM mode is possible if the dimension of the waveguide are properly chosen.

d.

propagation constant is a real quantity.

Discuss
Answer: (a).guide wavelength is never less than free space wavelength.
Q277.
In a vertical earthed antenna the base input impedance will be inductive for a height

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q278.
Voltage standing wave pattern in a loss less transmission line with characteristic impedance 50 ฮฉ and a resistive load is shown in the figure. Reflection coefficient is given by

a.

-0.6

b.

-1

c.

0.6

d.

0

Discuss
Answer: (c).0.6
Q279.
The electric field of an EM wave propagating in the z direction given by following equation. The wave is

a.

linearly polarized in z direction

b.

elliptically polarized

c.

left hand circularly polarized

d.

right hand circularly polarized

Discuss
Answer: (c).left hand circularly polarized
Q280.
The radiation pattern of two element collinear array is represent in

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Page 28 of 63