Communication Systems Test

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Communication Systems Test - 1

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Question 1
1 / -0

Electronic communication refers to

A
transfer of messages encoded in electrical signals

B
transfer of information encoded in electrical signals

C
transfer of electricity from one point to another

D
transfer of information or messages encoded in electrical signals

Solution

Explanation:

When information are sent from one point to the other it has to be converted into electrical signal using transducer.The receiver receives it in its original from using receiver.Such from of communication is called electronic communication.
Question 2
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The three elements of a generalized communication system are

A
Transmitter, multiplier and receiver

B
Transmitter, transmission channel and detector

C
Transmitter, transmission channel and receiver

D
Transmitter, noise generator and receiver

Solution

Explanation:

In communication the Transmitter helps in transmitting the signal through communication channel which acts as a physical path that connects transmitter to a receiver.And the receiver receives the transmitted signal and converts those signals in their original form.
Question 3
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Electronic communication is not possible if

A
if the temperature is high

B
if the humidity is high

C
message or information is not available in the form of electrical signals

D
if smell or touch is to be transmitted

Solution

Explanation:

As the information or message is transmitted from the source to the receiver ,it is first converted into electrical signal which is then transmiited through the communication medium.Hence in electrical communication it is must to convert raw message or information into electrical signal.Else the electronic messages will not be transmitted.
Question 4
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Which of these is an example of point to point communication?

A
Telephony

B
AM Radio

C
TV

D
FM Radio

Solution

Explanation:

In point to point communication,communication occurs over a link between a single transmitter and receiver.Telephony is an example of it as it needs a link between caller and receiver to transmit the information.This link is provided by various media like cable.
Question 5
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Which of these is an example of broadcast communication?

A
Telephony

B
FAX

C
Mobile

D
Radio

Solution

Explanation:

In broadcast mode of communication a large number of receivers are linked to a single transmiiter.Radio works as receiver which converts the transmiited information/message into the original form of the information.
Question 6
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Transducer is a device that

A
converts electrical signals to non electrical signals

B
converts low power to high power

C
converts high power to low power

D
converts non electrical signals to electrical signals

Solution

Explanation:

Any device which converts energy from one form to another is called a transducer.It converts variation in physical quantities such as pressure,dispalcement,force,temprature etc.Like microphone converts sound signal into an electrical signal.
Question 7
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Which of these can be used to convert position signals to electrical signals?

A
Potentiometer

B
microphone

C
loudspeaker

D
AC generator

Solution

Explanation:

Potentiometer is device which can be used to measure and control frequency,temprature etc.Hence changing frequency in signal coverts it into electrical signal.
Question 8
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Which of these is an acoustic transducer?

A
transformer

B
loudspeaker

C
potentiometer

D
microphone

Solution

Explanation:

Acoustic transducer is a device which converts one form of signal into another without any direct contact.
Question 9
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Digital weighing balance uses

A
an acceleration transducer

B
a position transducer

C
a velocity transducer

D
a force transducer

Solution

Explanation:

A force transducer is also known as a force sensor this converts an input mechanical force into output electrical signal.Hence a force transducer is used in digital weighing balance.
Question 10
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Signal in electronic communication refers to

A
constant function of time like 3v

B
large values of electrical voltages like 220 volts

C
small values of the order of micro to milli volts varying with time

D
Very large values of electrical voltages like 5 KV

Solution

Explanation:

In communication a signal implies a time varying electrical signal obtained by transforming original signal with the help of a suitable transducer.It is single valued function of time that conveys the information.

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Communication Systems Test - 1

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Communication Systems Test - 1

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Question 1

transfer of messages encoded in electrical signals

transfer of information encoded in electrical signals

transfer of electricity from one point to another

transfer of information or messages encoded in electrical signals

Solution

Question 2

Transmitter, multiplier and receiver

Transmitter, transmission channel and detector

Transmitter, transmission channel and receiver

Transmitter, noise generator and receiver

Solution

Question 3

if the temperature is high

if the humidity is high

message or information is not available in the form of electrical signals

if smell or touch is to be transmitted

Solution

Question 4

Telephony

AM Radio

TV

FM Radio

Solution

Question 5

Telephony

FAX

Mobile

Radio

Solution

Question 6

converts electrical signals to non electrical signals

converts low power to high power

converts high power to low power

converts non electrical signals to electrical signals

Solution

Question 7

Potentiometer

microphone

loudspeaker

AC generator

Solution

Question 8

transformer

loudspeaker

potentiometer

microphone

Solution

Question 9

an acceleration transducer

a position transducer

a velocity transducer

a force transducer

Solution

Question 10

constant function of time like 3v

large values of electrical voltages like 220 volts

small values of the order of micro to milli volts varying with time

Very large values of electrical voltages like 5 KV

Solution

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