Tag: communication systems

Quizzes (8) Questions (79)

Questions Related to communication systems

Multiple choice different modes of communication and their uses information technology communication systems physics

The working of mobile is similar to the working of which of the following devices?

  1. T.V

  2. Radio

  3. FAX

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cellphone and radio works the same way. Cellphone can be said as a two way radio as both the sender and receiver can send audio signals simultaneously while in radio only audio signals are sent one way from sender to receiver .

The way mobile works is same as radio .The audio waves goes to the mic where they are converted to electric signals,then they are carried to receiver's device by modulation and then again the receiver's  device converts the electric signals to the audio output.

Multiple choice different modes of communication and their uses information technology communication systems physics

The sound waves in telephonic communication are converted into electric signals by the________ and the signals reach the _____________  at the other end by cables.

  1. mouthpiece,mouthpiece

  2. mouthpiece,earpiece

  3. earpiece,mouthpiece

  4. earpiece,earpiece
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The mouthpiece has a mic that converts the audio waves  from our voice to electric signals , that are carried further away to receiver .

The earpiece has a speaker ,A speaker converts the electric signal received to the audio wave .

Multiple choice different modes of communication and their uses information technology communication systems physics

Two-way radio device is called ________ .

  1. FAX machine

  2. Radio

  3. Mobile phones

  4. Microwave
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mobile phones are called two way radio devices as the communication is done the same way as Radio , but here both the sender and receiver can send information at the same time simultaneously . Unlike the radio;s where only sender can send the information and receiver will receive it at a moment of time

Multiple choice different modes of communication and their uses information technology communication systems physics

Which of the following is not the advantage of communication through mobile?

  1. Voice message, text message facilities.

  2. It can be used as a mini computer

  3. It can be used to print the documents saved

  4. Communication between two persons even if they are moving
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A mobile phone can be used to send voice and text message .Also it can be used as a mini computer due to increasing processor's power these days and the communication between any two persons can be done even if they are moving .

It cannot be used to print the document saved as it does not have that printing technology in it rightnow

Multiple choice different modes of communication and their uses information technology communication systems physics

Arrange the following in accordance to block diagram of a T.V transmitter.
a) T.V Camera
b) Photo cell
c) Amplification
d) VF signals
e) Amplifier
f) Modulation

  1. a,b,d,c,f,e

  2. b,a,d,c,f,e

  3. a,b,c,d,e,f

  4. f,b,e,c,a,d
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

$\boxed{T.V. Camera}$

           $\downarrow$
$\boxed{Photo cell}$
           $\downarrow$
$\boxed{V.F. signals}$
           $\downarrow$
$\boxed{Amplification}$

           $\downarrow$
$\boxed{Modulation}$
           $\downarrow$
$\boxed{Amplifier}$

block diagram of a T.V. transmitter

Multiple choice different modes of communication and their uses information technology communication systems physics

The part of telephone instrument which is placed in front of mouth and collects sound and then propagates the information in the form of electromagnetic waves is called:

  1. Mouth-piece

  2. Receiver

  3. Cable wire

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The earpiece consists of an internal receiver that translates electronic signals into sound that a person can comprehend. On the other end of the handset is the mouthpiece, which consists of the transmitter. The transmitter is really a microphone that catches sound waves. The sound is then converted.  Hence the answer is mouth-piece.
Multiple choice different modes of communication and their uses information technology communication systems physics

Printed documents to be transmitted by fax are converted into electrical signals by the process of :

  1. Reflection

  2. Scanning

  3. Modulation

  4. Light variation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Fax machine scans a page to make an electronic representation of its text or graphics, compresses the data to save transmission time, and transmits it to another fax machine. The receiving machine decrypts the signal and uses a printer  to make a facsimile of the original page.

Multiple choice different modes of communication and their uses information technology communication systems physics

Which one of the following is a full duplex transmission system?

  1. TV

  2. Radio

  3. Telephone

  4. Walk-talky (wireless used in the Army)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In a full-duplex system, both parties can communicate with each other simultaneously. An example of a full-duplex device is a telephone; the parties at both ends of a call can speak and be heard by the other party simultaneously.

Multiple choice different modes of communication and their uses information technology communication systems physics

Which of the following groups of instruments is required to have communication line between two television relay centres?

  1. Microwave link, booster relay, satellite

  2. Radio telescope, microwave link, booster relay, telephone

  3. Microwave link, telephone, booster relay, satellite

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Television relay centers require long-distance, high-bandwidth transmission methods. Microwave links, booster relays, and satellites are standard components used to transmit television signals across large distances.

Multiple choice different modes of communication and their uses information technology communication systems physics

The computer jargon - WWWW, stands for 

  1. World Wide Web Worm

  2. World Wide Wildlife Web

  3. World Wide Women's Web

  4. World Wide Women's Week
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The World-Wide Web Worm (WWWW) is the first search engine for the World-Wide Web, though it was not released until March 1994, by which time a number of other search engines had been made publicly available.

It was developed in September 1993 by Oliver McBryan at the University of Colorado. The worm created a database of 300,000 multimedia objects which could be obtained or searched for keywords via the WWW. In contrast to present-day search engines, the WWWW featured support for Perl regular expressions.