The transmission of high frequencies in a coaxial cable is determined by

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

100 V

carrier wave is made to vary between

160 V

and

40 V

by a modulating signal. What is the modulation index?

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.

An antenna uses electromagnetic waves of frequency

5 M H z

. For proper working, the size of the antenna should 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.

For television broadcasting the frequency employed is normally in range,

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

100 m

long antenna is mounted on a

500 m

tall building. The complex can become a transmission tower for waves with

λ

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 signal is to be transmitted through a wave of wavelength

λ,

using a linear antenna. The length

l

of the antenna and effective power radiated

P_{eff}

will be given, respectively, as-
(

K

is a constant of proportionality)

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

T V

transmitter has a range of

50 km

. The height of the

T V

transmitter is _______

(

Radius of the earth

R_{e} = 6.4 \times 10^{6} m)

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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.

An amplitude modulated waves is represented by expression

v_{m} = 5 (1 + 0.6 \cos 6280 t) \sin (211 \times 10^{4} t) V

. The minimum and maximum amplitudes of the amplitudes modulated wave are, respectively:

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.

The increase in the height of the tower of height

200 m

to get its coverage range tripled 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.

A signal

A c o s ω t

is transmitted using

ν_{0} s i n ω_{0} t

as carrier wave. The correct amplitude modulated

(A M)

signal 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.

The wavelength of the carrier waves in a modern optical fiber communication network is close to:

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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.

The radius of the Earth is

6400 km

. If the height of an antenna is

500 m

, then its range 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.

The difference in the refractive index of the fiber core and fiber cladding in step-index fibers is typically

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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.

A repeater in

T . V .

transmission 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.

The transmitting antenna placed at the top of a tower has a height of

45 m

from the ground. The distance between receiving and transmitting antennas is

40 km

and the radius of earth is

6400 km

. The minimum height (in

m

at which the receiving antenna is to be placed for satisfactory communication in

L O S

mode, 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.

The wireless communication frequency bands for Cellular Mobile Radio (mobile to base station) are in the range of

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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.

Given below are two statements:

Statement I : A speech signal of $2 kHz$ is used to modulate a carrier signal of $1 MHz$ . The bandwidth requirement for the signal is $4 kHz$ .

Statement II : The side band frequencies are $1002 kHz$ and $998 kHz$ . In the light of the above statements, choose the correct answer from the options given below:

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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.

A TV tower is

120 m

high. How much more height is to be added to it, if its coverage range is to become double?

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.

In frequency modulated wave

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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.

In communication system the process of superimposing a low frequency signal on a high frequency wave is known as

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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.

A carrier wave of peak voltage

14 V

is used for transmitting a message signal. The peak voltage of the modulating signal given to achieve a modulation index of

80 %

will be:

The transmission of high frequencies in a coaxial cable is determined by

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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