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 13 of 63

Q121.
The effective length of an λ/2 antenna (Given Rr = 73 Ω and (Ae)max = 0.13 λ² and η = 120 π is __________ .
Discuss
Answer: (b).0.317 λ
Q122.
A vertical wire of 1 meter length carries a current of 1 A at 10 MHz. The total radiated power is nearly
Discuss
Answer: (d).73 W
Q123.
The length of half-wave antenna is at 30 MHz
Discuss
Answer: (b).5 meter
Q124.
For a 400 kHz transmission line having L = 0.5 mH/km, C = 0.08 mF and negligible R and G, the characteristic impedance will be
Discuss
Answer: (d).79 Ω
Q125.
Beamwidth (between first nulls) will be for an antenna at 3 MHz with directivity of 100
Discuss
Answer: (a).140°
Q126.
A broadside array consisting of 200 cm wavelength with 10 half-wave dipole spacing 10 cm. And if each array element feeding with 1 amp. current and operating at same frequency then find the radiated power
Discuss
Answer: (a).730 W
Q127.
If wave of critical frequency 30 MHz is departing at an angle of 60°, then the MUF is given to be
Discuss
Answer: (d).60 MHz
Q128.
An antenna having an effective temperature of 27°K is fed into a microwave amplifier that has an effective noise temperature of 30 K. Calculate the available noise power per unit bandwidth
Discuss
Answer: (b).57 K
Q129.
Calculate cut off frequency for dominant mode in rectangular waveguide if dimensions are a = 2, b = 1 cm.
Discuss
Answer: (a).7.5 GHz
Q130.
The input impedance for a half dipole if radii of both the antenna is 4 and 8 meter respectively
Discuss
Answer: (c).657 Ω