Tag: physics

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Questions Related to physics

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

The device that can be used to send a hardcopy of a document to other places quickly is _________ .

  1. Mobile phone

  2. FAX machine

  3. Television

  4. Radio
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
FAX Machine is a device that can be used to send a hardcopy of a document to other places quickly .It scans the document through photocells and the data is transmitted over telephone lines to the receiver's FAX machine, where the data is again printed on a paper as a hardcopy of the original.

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

At which place our countries first telephone exchange was established?

  1. Delhi

  2. Mumbai

  3. Pune

  4. Bangalore
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
In 1881, the Government later reversed its earlier decision and a licence was granted to the Oriental Telephone Company Limited of England for opening telephone exchanges at Calcutta, Bombay, Madras and Ahmedabad and the first formal telephone service was established in the country.
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

The purpose of dividing each frame into two field so as to transmit $50$ views of the picture per second is 

  1. To avoid flicker in the picture

  2. The fact that handling of higher frequencies is easier

  3. That $50 Hz$ is the power line frequency in India

  4. To avoid unwanted noises in the signals
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This procedure is often applied in interlace scanning which helps to reduce flick (as it involves more number of views in the picture per second ) in the received image without increasing the channel bandwidth.

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

In internet terminology IP means 

  1. Internet Provider

  2. Internet Protocol

  3. Internet Procedure

  4. Internet Processor
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

IP stands for Internet Protocol. The Internet Protocol (IP) is the principal communications protocol in the Internet protocol suite for relaying datagrams across network boundaries. Its routing function enables internetworking, and essentially establishes the Internet.

IP has the task of delivering packets from the source host to the destination host solely based on the IP addresses in the packet headers