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

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Q121.
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
Q122.
Calculate cut off frequency for dominant mode in rectangular waveguide if dimensions are a = 2, b = 1 cm.
Discuss
Answer: (a).7.5 GHz
Q123.
The input impedance for a half dipole if radii of both the antenna is 4 and 8 meter respectively
Discuss
Answer: (c).657 ฮฉ
Q124.
A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the guide wavelength for dominant mode.
Discuss
Answer: (d).3/88 m
Q125.
A rectangular waveguide measures 3 x 4.5 cm internally and has a 10 GHz signal propagated in it. Calculate the cut off frequency for dominant mode.
Discuss
Answer: (c).5 GHz
Q126.
An isolated sphere in air has a radius equal to 1/4ฯ€ฮตโ‚€ meter, its capacitance is
Discuss
Answer: (b).1F
Q127.
Find cut off wavelength for mode TE11 in a circular waveguide having radius 2 cm. Assume K'a = 1.841
Discuss
Answer: (b).6.82 cm
Q128.
The refractive index of E layer, if angle of incidence is 30°
Discuss
Answer: (a).0.5
Q129.
A transmission line having 50 ฮฉ impedance is terminated in a load of (40 + j 30) ฮฉ. The VSWR is
Discuss
Answer: (d).2
Q130.
Calculate the wave number in waveguide having dimensions 4 x 2 cm at 3 GHz
Discuss
Answer: (b).62.8