Tag: information technology

Questions Related to information technology

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

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

  1. T.V

  2. Radio

  3. FAX

  4. None of these

Show answer
Correct Option: B
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.

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

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

  1. mouthpiece,mouthpiece

  2. mouthpiece,earpiece

  3. earpiece,mouthpiece

  4. earpiece,earpiece

Show answer
Correct Option: B
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 .

Two-way radio device is called ________ .

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

  1. FAX machine

  2. Radio

  3. Mobile phones

  4. Microwave

Show answer
Correct Option: C
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

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

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

  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

Show answer
Correct Option: C
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

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

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

  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

Show answer
Correct Option: A
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

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:

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

  1. Mouth-piece

  2. Receiver

  3. Cable wire

  4. None of the above

Show answer
Correct Option: A
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.

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

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

  1. Reflection

  2. Scanning

  3. Modulation

  4. Light variation

Show answer
Correct Option: B
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.

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

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

  1. TV

  2. Radio

  3. Telephone

  4. Walk-talky (wireless used in the Army)

Show answer
Correct Option: C
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.

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

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

  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

Show answer
Correct Option: A

The computer jargon - WWWW, stands for 

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

  1. World Wide Web Worm

  2. World Wide Wildlife Web

  3. World Wide Women's Web

  4. World Wide Women's Week

Show answer
Correct Option: A
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.