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Earn 100

Video signal for transmission of pictures require about 4·2 MHz of bandwidth. A TV signal requires 6 MHz of bandwidth for transmission. Explain in brief . Mention bandwidth for speech signal. 

Important Questions on Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.

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Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
Draw the block diagram of generalised communication system.
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Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
Write a short note on sky wave propagation.
EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
What is the use of transducer in communication system?
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Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.

We do not transmit low frequency signal to long distances because
(a) The size of the antenna should be comparable to signal wavelength which is unreal solution for a signal of longer wavelength.
(b) Effective power radiated by a long wavelength baseband signal would be high.
(c) We want to avoid mixing up signals transmitted by different transmitter simultaneously.
(d) Low frequency signal can be sent to long distances by superimposing with a high frequency wave as well.

Therefore, the most suitable option will be :

EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
A carrier wave of peak voltage 15 V is used to transmit a message signal. What should be the peak voltage of the modulating signal in order to have a modulation index of 80%?
EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.

Match List-I with List-II

  List-I   List-II
(A) Television signal I.  3 kHz
(B) Radio signal II.  20 kHz
(C) High Quality Music III.  2 MHz
(D) Human speech IV.  6 MHz
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Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
Draw block diagram of basic elements of a communication system and write briefly the functions of different elements.
MEDIUM
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
A baseband signal of 3.5MHz frequency is modulated with a carrier signal of 3.5GHz frequency using amplitude modulation method. What should be the minimum size of antenna required to transmit the modulated signal ?
MEDIUM
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
In an optical communication system operating at 1200 mm, only 2% of the source frequency is available for TV transmission having a bandwidth of 5MHz. The number of TV channels that can be transmitted via this system is
EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
Explain the term transducer in communication system.
EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.

Give the advantages of digital communication system.

 

EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
A repeater in T.V. transmission is
EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.

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

EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
A TV transmission tower antenna is at a height of 20 m. Suppose that the receiving antenna is at.
(i) ground level
(ii) a height of 5 m.
The increase in antenna range in case (ii) relative to case (i) is n%. The value of n, to the nearest integer, is.
MEDIUM
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
The difference in the refractive index of the fiber core and fiber cladding in step-index fibers is typically
EASY
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
Antenna is
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Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

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Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
Through which mode of propagation, the radio waves can be sent from one place to another
MEDIUM
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
In satellite communication, the communication satellite;
MEDIUM
Physical Sciences>Waves and Their Applications in Technologies for Information Transfer>Communicate technical information about how some technological devices use the principles of wave behavior and wave interactions with matter to transmit and capture information and energy.>Information Technologies and Instrumentation - Multiple technologies based on the understanding of waves and their interactions with matter are part of everyday experiences in the modern world (e.g., medical imaging, communications, scanners) and in scientific research. They are essential tools for producing, transmitting, and capturing signals and for storing and interpreting the information contained in them.
The transmission media can be