Communication Systems - Part 1 Online Exam Quiz

Communication Systems - Part 1 GK Quiz. Question and Answers related to Communication Systems - Part 1. MCQ (Multiple Choice Questions with answers about Communication Systems - Part 1

A cordless telephone using separate frequencies for transmission in base and portable units is known as


A : duplex arrangement

B : half duplex arrangement

C : either (a) or (b)

D : neither (a) nor (b)

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For attenuation of high frequencies we should use


A : shunt capacitance

B : series capacitance

C : inductance

D : resistance

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A modem is classified as low speed if data rate handled is


A : upto 100 bps

B : upto 250 bps

C : upto 400 bps

D : upto 600 bps

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VSB modulation is preferred in TV because


A : it reduces the bandwidth requirement to half

B : it avoids phase distortion at low frequencies

C : it results in better reception

D : none of the above

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A woofer should be fed from the input through a


A : low pass filter

B : high pass filter

C : band pass filter

D : band stop filter

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The colour subcarrier and sidebands produced by its modulation with the chrominance signals are accommodated in the standard channel width by the process of


A : frequency adjustment

B : frequency interleaving

C : frequency changing

D : frequency amalgamation

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In FM signal with a modulation index m f is passed through a frequency tripler. The wave in the output of the tripler will have a modulation index of


A : m f

B : 3 m f

C : m f /3

D : m f /9

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In colour TV receiver, varactor diode is used for


A : detection

B : rectification

C : tuning

D : both (a) and (b)

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The number of noise sources in a BJT are


A : 3

B : 2

C : 1

D : 4

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Energy content of atmospheric noise


A : does not depend on frequency

B : decreases as frequency is increased

C : increases as frequency is increased

D : either (a) or (c) depending on the temperature

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