Communication Systems - Online Test
Q1. Electronic communication refers to
Answer : Option B
Explaination / Solution:
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.
Q2. The three elements of a generalized communication system are
Answer : Option A
Explaination / Solution:
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.
Q3. Electronic communication is not possible if
Answer : Option A
Explaination / Solution:
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.
Q4. Which of these is an example of point to point communication?
Answer : Option C
Explaination / Solution:
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.
Q5. Which of these is an example of broadcast communication?
Answer : Option C
Explaination / Solution:
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.
Q6. Transducer is a device that
Answer : Option B
Explaination / Solution:
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.
Q7. Which of these can be used to convert position signals to electrical signals?
Answer : Option B
Explaination / Solution:
Potentiometer is device which can be used to measure and control frequency,temprature etc.Hence changing frequency in signal coverts it into electrical signal.
Q8. Which of these is an acoustic transducer?
Answer : Option D
Explaination / Solution:
Acoustic transducer is a device which converts one form of signal into another without any direct contact.
Q9. Digital weighing balance uses
Answer : Option D
Explaination / Solution:
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.
Q10. Signal in electronic communication refers to
Answer : Option B
Explaination / Solution:
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.
