Radio Receivers MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Radio Receivers, 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 Radio Receivers 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 Radio Receivers mcq questions that explore various aspects of Radio Receivers problems. Each MCQ is crafted to challenge your understanding of Radio Receivers 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 Radio Receivers 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 Radio Receivers. 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 Radio Receivers knowledge to the test? Let's get started with our carefully curated MCQs!

Radio Receivers MCQs | Page 10 of 10

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Q91.
An unmodulated voltage 10 V effective is applied to a dioxide detector in which load resistance is 4 x 10¯⁵ ohms. A micrometer shows that the rectified DC current in this resistance is 30 A. The efficiency of detection is

a.

34%

b.

55.5%

c.

68.8%

d.

84.7%

Discuss
Answer: (d).84.7%
Q92.
Selectivity varies with receiving frequency, frequency is raised.

a.

Somewhat better when the receiving frequency is raised

b.

Somewhat better at intermediate frequency

c.

Somewhat worse when the receiving frequency is lowered

d.

Somewhat worse when the receiving frequency is raised

Discuss
Answer: (d).Somewhat worse when the receiving frequency is raised
Q93.
The sensitivity curve of a standard receiver is represented by

a.

curve A

b.

curve B

c.

curve C

d.

curve D

Discuss
Answer: (c).curve C
Q94.
When fs is the signal frequency and fi is the intermediate frequency, then image frequency fsi is given by

a.

A

b.

B

c.

C

d.

D

Discuss
Answer: (b).B
Q95.
Which curve represents the fidelity curve of a standard receiver?

a.

Curve A

b.

Curve B

c.

Curve C

d.

Curve D

Discuss
Answer: (c).Curve C
Q96.
The selectivity curve of a standard receiver is represented by

a.

curve A

b.

curve B

c.

curve C

d.

curve D

Discuss
Answer: (c).curve C
Q97.
A receiver having an RF amplifier and an IF of 450 kHz, has Q of the coils 65 and an incoming frequency of 1200 kHz. The image rejection of the receiver is

a.

5870

b.

3655

c.

236

d.

13.3

Discuss
Answer: (c).236
Q98.
A padder is basically a/an

a.

insulator

b.

variable resistor

c.

capacitor

d.

inductor

Discuss
Answer: (d).inductor
Q99.
In a radio receiver, the local oscillator is always tuned to a frequency higher than the incoming frequency to

a.

facilitate tracking

b.

allow permit adequate frequency coverage without switching

c.

facilitate image frequency rejection

d.

all of the above

Discuss
Answer: (b).allow permit adequate frequency coverage without switching
Q100.
When a superheterodyne receiver is tuned to 455 kHz, its local oscillator provides a mixer with the input at 1010 kHz. The image frequency is

a.

555 kHz

b.

1010 kHz

c.

1465 kHz

d.

1920 kHz

Discuss
Answer: (c).1465 kHz
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