Tag: elements of a communication system

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Questions Related to elements of a communication system

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

The term channel is used to indicate

  1. the amplitude range allocated to a given source

  2. the frequency range allocated to a given source

  3. the voltage-range allocated to a given source

  4. all of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Channel represents the different frequency ranges over with radio frequencies exist. A change in channel for device would mean a change in range of frequency over which the device is being operated.

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

Consider telecommunication through optical fibres. Which of the following statement is not true?

  1. Optical fibres may have homogenous core with a suitable cladding.

  2. Optical fibres can be graded refractive index.

  3. Optical fibres are subject to electromagnetic interference from outside.

  4. Optical fibres have extremely low transmission loss.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Optical fibres are not subjected to electro-magnetic interference from outside.

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

Without which of the following a generalized block diagram of communication system is incomplete?

  1. Channel

  2. Receiver

  3. Transmitter

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Transmitter - which converts the signal in an electrical signal and then sends it.

Channel - which carries the signal.
Receiver - which receives and converts the signal in original form.

These three are essential  for a communication system.

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

What are the three essential part of a communication system?

  1. transmitter, channel and receiver

  2. transmitter, information source and receiver

  3. information source ,transmitter and channel

  4. transmitter , noise and channel
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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

  1. Optical fiber communication

  2. Microwave communication

  3. Coaxial cable communication

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

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

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

  1. 1925

  2. 1926

  3. 1927

  4. 1928
Reveal answer Fill a bubble to check yourself
C Correct answer
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.
Multiple choice physics communication system elements of a communication system elements of communication system electromagnetic waves and communication system

A receiver in a communication system must have

  1. Pick-up antenna

  2. Demodulator

  3. Amplifier

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
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 .

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

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

  1. sub-channeling

  2. signal switching

  3. SINAD

  4. multiplexing
Reveal answer Fill a bubble to check yourself
D Correct answer
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