Tag: elements of communication system

Questions Related to elements of communication system

What are the three essential part of a communication system?

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. transmitter, channel and receiver

  2. transmitter, information source and receiver

  3. information source ,transmitter and channel

  4. transmitter , noise and channel

Show answer
Correct Option: A
Explanation:

Transmitter- which converts the signal in an electrical signal and then send it. Channel - which carries the signal.

Receiver - which receives and converts the signal in original form.
These three are essential  for a communication system.

Which of the following is/are the example(s) of  real life telecommunication system?

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. Optical fiber communication

  2. Microwave communication

  3. Coaxial cable communication

  4. None of the above

Show answer
Correct Option: A,B,C
Explanation:

Optical Fiber Communication, Microwave communication, and  coaxial cable communication are all being used in real life as communication systems. These are the advanced systems with high information transfer rate.

In which year, the radio broadcasting had started in India?

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. 1925

  2. 1926

  3. 1927

  4. 1928

Show answer
Correct Option: C
Explanation:
According to an agreement of 23 July 1927, the private Indian Broadcasting Company LTD (IBC) was authorised to operate two radio stations; the Bombay station began on 23 July 1927, and the Calcutta station followed on 26 August 1927.

The waves used in telecommunication are

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. Infrared

  2. Ultraviolet

  3. Microwaves

  4. Cosmic rays

Show answer
Correct Option: C
Explanation:

In general Radio waves are used to transmit television and radio programs and Microwaves are used to transmit satellite television and for mobile phones.

A receiver in a communication system must have

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. Pick-up antenna

  2. Demodulator

  3. Amplifier

  4. All of these

Show answer
Correct Option: A
Explanation:

A receiver in a communication system must have a pick-up antenna , a demodulator and an amplifier . A pick-up antenna is used to receive the signal . Then demodulator , separates the carrier wave from original signal . And amplifier , gives strength to the weak original signal .

When two or more signals share a common channel, it is called:

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. sub-channeling

  2. signal switching

  3. SINAD

  4. multiplexing

Show answer
Correct Option: D
Explanation:

When more than one signal shares a common channel for broadcasting, the method is known as multiplexing. The sent signal will be a single, complex signal and the receiver recovers the separate signals by a process called demultiplexing

A complete communication system must include:

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. a transmitter and receiver

  2. a transmitter, a receiver, and a channel

  3. a transmitter, a receiver, and a spectrum analyzer

  4. a multiplexer, a demultiplexer, and a channel

Show answer
Correct Option: C
Explanation:

A communication system requires a transmitter to upload the signal, a receiver to receive the signal and a channel to carry this information

An antenna is a device that converts

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. electromagnetic energy into radio frequency

    signal

  2. radio frequency signal into electromagnetic

    energy

  3. guided electromagnetic waves into free space

    electromagnetic waves

  4. free space electromagnetic waves into guided

    electromagnetic waves

Show answer
Correct Option: C,D
Explanation:

$Answer:-$ C ,D

An antenna (plural antennae or antennas), or aerial, is an electrical device which converts electric power (guided electromagnetic waves) into radio waves(free spaceelectromagnetic waves), and vice versa. It is usually used with a radio transmitter or radio receiver.

Basically, a communication system is a 

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. Transmitter

  2. Receiver

  3. Messenger

  4. all of these

Show answer
Correct Option: D

The collection of communication line and routers form the:

physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

  1. Router

  2. Bridge

  3. Submet

  4. Packet

Show answer
Correct Option: C
Explanation:

The collection of communication line and routers from the subnet.