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Test: Communication System- 4 - Electrical Engineering (EE) MCQ


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25 Questions MCQ Test - Test: Communication System- 4

Test: Communication System- 4 for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Test: Communication System- 4 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Test: Communication System- 4 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Communication System- 4 below.
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Test: Communication System- 4 - Question 1

Which of the following are the advantages of FM and AM

1. Better noise immunity is provided

2. Lower bandwidth is required

3. The transmitted power is more useful

4. Less modulating power is required

Select the correct answer using the codes given below:

Test: Communication System- 4 - Question 2

Why does an FM radio station perform better than an AM station radiating the same total power

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Test: Communication System- 4 - Question 3

Which one of the following is an indirect way of generating FM

Test: Communication System- 4 - Question 4

Which one of the following is an indirect way of generating FM

Test: Communication System- 4 - Question 5

Pre-emphasis in FM systems involves

Test: Communication System- 4 - Question 6

In FM, modulation index mf is equal to ( Δ f is the frequency deviation, and fm is the modulating signal frequency)

Test: Communication System- 4 - Question 7

FM broadcast standards specify a maximum deviation of frequency to be equal to 75 kHz and a maximum modulating frequency of 15 kHz. What is the modulation index for FM wave

Test: Communication System- 4 - Question 8

The modulation index of an FM signal, having a carrier swing of 100 kHz with modulation signal frequency of 8 kHz is

Test: Communication System- 4 - Question 9

When the modulating frequency is doubled, the modulation index is halved and the modulating voltage remains constant. The modulation is

Test: Communication System- 4 - Question 10

In a narrowband FM system, the highest modulating frequency is fm. The bandwidth of the system will be

Test: Communication System- 4 - Question 11

The bandwidth of a narrow band FM signal generated by a 4 kHz audio signal modulating a 125 MHz carrier is

Test: Communication System- 4 - Question 12

An FM signal with a modulation index 9 is applied to a frequency tripler. The modulation index in the output signal will be

Test: Communication System- 4 - Question 13

The ratio W for 100% amplitude modulation with identical total transmitted power (mf is modulation index of FM) is

Test: Communication System- 4 - Question 14

With the increase in the transmission bandwidth, received signal-power in AM and FM will,respectively

Test: Communication System- 4 - Question 15

In phase modulation, phase deviation is proportional to

Test: Communication System- 4 - Question 16

In phase modulation, the frequency deviation is

Test: Communication System- 4 - Question 17

Consider an angle modulated signal x(t) = 6 cos[2 π × 106t + 2 sin (8000 π t) + 4cos (8000 π t)VThe average power of x(t) is

Test: Communication System- 4 - Question 18

Fading is

Test: Communication System- 4 - Question 19

In a BPSK signal detector, the local oscillator has a fixed phase error of 20º. By what factor does this phase error deteriorate the SNR at the output

Test: Communication System- 4 - Question 20

Which one of the following blocks is not common in both AM and FM receivers

Test: Communication System- 4 - Question 21

When a radio receiver is tuned to 455 kHz, its local oscillator provides the mixer with an input at 1010 kHz. What is the frequency of the other station

Test: Communication System- 4 - Question 22

In conventional AM superheterodyne receivers, the detectors employed to extract intelligence include

Test: Communication System- 4 - Question 23

Double spotting in superheterodyne receivers is caused by

Test: Communication System- 4 - Question 24

The main advantage of pre-emphasis circuit in FM transmitter is

Test: Communication System- 4 - Question 25

The de-emphasis filter in an FM receiver comes

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