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 53 of 63

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Q521.
In a four element Yagi-Uda antenna

a.

there is one driven element, one director and two reflectors

b.

there is one driven element, two directors and one reflector

c.

there are two driven elements, one director and two reflectors

d.

all the 4 elements are driven element

Discuss
Answer: (b).there is one driven element, two directors and one reflector
Q522.
The statement that the line integral of magnetic field about any closed path is exactly equal to the direct current enclosed by that path, is known as

a.

Ampere's circuital law

b.

Coulomb's law

c.

Electrostatic's theory

d.

None of the above

Discuss
Answer: (a).Ampere's circuital law
Q523.
Transverse magnetic (TM) waves have

a.

magnetic field component H in the direction of propagation

b.

electric field component E in the direction of propagation

c.

magnetic field component H in the direction of propagation and no component of electric field E in this direction

d.

electric field component E in the direction of propagation and no component of magnetic field H in this direction

Discuss
Answer: (d).electric field component E in the direction of propagation and no component of magnetic field H in this direction
Q524.
UHF and microwaves in the frequency range 300 MHz to 30 GHz can be best transmitted using __________ propagation

a.

sky wave

b.

ground wave

c.

duct

d.

none of the above

Discuss
Answer: (c).duct
Q525.
The directive gain of ฮป/2 resonant wire is 1.64.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q526.
The effective height of a vertical radiator can be increased by

a.

loading with lumped inductance

b.

supporting on an insulator

c.

capacitive loading

d.

giving input more power

Discuss
Answer: (c).capacitive loading
Q527.
When an electromagnetic wave travelling in one medium strikes upon a second medium (having a different conductivity) the wave will be

a.

totally transmitted

b.

totally reflected

c.

neither transmitted nor reflected

d.

partially transmitted and partially reflected

Discuss
Answer: (d).partially transmitted and partially reflected
Q528.
The line of sight communication requires that transmit and receive antennas to face each other. If the transmit antenna is vertically polarized, for the best reception the receive antenna should be

a.

horizontally polarized

b.

vertically polarized

c.

at 45° with respect to horizontal polarization

d.

at 45° with respect to vertical polarization

Discuss
Answer: (a).horizontally polarized
Q529.
Maximum power transfer will take place in a practical antenna if (XL = Load Reactance, XA Antenna Reactance)

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (a).A
Q530.
VSWR is related with reflection co-efficient as

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
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