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 1 of 63

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Q1.
Charge needed within a unit sphere centred at the origin for producing a potential field,

a.

12 ฯ€c

b.

60 ฯ€c

c.

120 ฯ€c

d.

180 ฯ€c

Discuss
Answer: (c).120 ฯ€c
Q2.
Which one of the following does represents the electric field lines for the TE02 mode in the cross section of a hollow rectangular metallic waveguide?

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q3.
Consider a 300 ฮฉ, quarter wave long at 1 GHz transmission line as shown in figure. It is connected to a 10 V, 50 ฮฉ source at one end is left open circuited at the other end. The magnitude of the voltage at the open circuit end of the line is

a.

10 V

b.

5 V

c.

60 V

d.

60/7 volt

Discuss
Answer: (a).10 V
Q4.
Most antenna consisting of a 50 meter long vertical conductor operates over a perfectly conducting ground plane. It is base fed at a frequency of 600 kHz. The radiation resistance of the antenna in ohms is

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (c).C
Q5.
A plane wave is characterized by following equation. The wave is

a.

linearly polarized

b.

circularly polarized

c.

elliptically polarized

d.

unpolarized

Discuss
Answer: (c).elliptically polarized
Q6.
The number of free electrons in acceptor atom is

a.

1

b.

2

c.

3

d.

4

Discuss
Answer: (c).3
Q7.
Consider a loss less antenna with a directive gain of + 6 dB. If 1 mW of power is fed to it the total power radiated by the antenna will be

a.

4 mW

b.

1 mW

c.

7 mW

d.

1/4 mW

Discuss
Answer: (a).4 mW
Q8.
Which of the following should dominant wave have?

a.

Lowest cut off frequency

b.

Highest cut off frequency

c.

No attenuation

d.

No phase shift

Discuss
Answer: (a).Lowest cut off frequency
Q9.
Find the noise factor for an antenna at 27°C with equivalent noise temperature 30°K

a.

20

b.

100

c.

300

d.

1.1

Discuss
Answer: (d).1.1
Q10.
The displacement flux density at a point on the surface of a perfect conductor is D = 2(ax - โˆš3 az)c/m² pointing away from the surface. The charge density at that point c/m² will be

a.

2

b.

- 2

c.

4

d.

- 4

Discuss
Answer: (c).4
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