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NEET Communication System PYQs with Solutions

56 previous year questions from Communication System (NEET UG Physics) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

56 questionsPhysics2003–2019Answers + solutions

About Communication System PYQs

Communication System has 56 previous year questions in the Quantrex Academy NEET UG Physics bank. The 56 questions in this list come from NEET (28), AIIMS (25) and JIPMER (3), spanning 2003 to 2019. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET Communication System PYQs with Solutions

About Communication System PYQs

Questions by year (this list)

Communication System questions with solutions

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general less stable than ground wave signals. Reason : The state of ionosphere

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general less stable than ground wave signals. Reason : The state of ionosphere

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals. Reason : The state of ionosphere

A ground receiver receives a signal at 5 MHz , transmitted by a ground transmitter at a height of 320 ~m , which is 110 ~km away from it. Then it can communicate through (radius

If the modulation index of an amplitude modulated wave is changed from 0 to 1 , then the transmitted power will be

In an amplitude modulated signal the maximum amplitude is 15 volt and minimum amplitude is 5 volt, then amplitude of modulating wave will be

A ground receiver receives a signal at 5 MHz , transmitted by a ground transmitter at a height of 320 ~m , which is 110 ~km away from it. Then it can communicate through (radius

If the modulation index of an amplitude modulated wave is changed from 0 to 1 , then the transmitted power will be

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals. Reason : The state of ionosphere

In an amplitude modulated signal the maximum amplitude is 15 volt and minimum amplitude is 5 volt, then amplitude of modulating wave will be

Assertion : Electromagnetic waves with frequencies smaller than the critical frequencies of ionosphere cannot be used for communication using sky wave propagation. Reason: The

Assertion : Electromagnetic waves with frequencies smaller than the critical frequencies of ionosphere cannot be used for communication using sky wave propagation. Reason: The

Assertion : Short wave communication over long distance is not possible via ground waves. Reason: The ground waves can bend round the corners of the objects on earth.

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals. Reason: The state of ionosphere

Assertion : Sky wave signals are used for long distance radio communication. These signals are in general, less stable than ground wave signals. Reason: The state of ionosphere

Assertion : Short wave communication over long distance is not possible via ground waves. Reason: The ground waves can bend round the corners of the objects on earth.

For satellite communication which wave is used ?

Assertion : In a communication system based on amplitude modulation the modulation index is kept < 1 . Reason : It ensures minimum distortion of signal.

If modulation index is 1 / 2 and power of carrier wave is 2 ~W . Then what will be the total power in modulated wave?

Long distance communication between two point on earth is achieved by

For satellite communication which wave is used ?

If modulation index is 1 / 2 and power of carrier wave is 2 ~W . Then what will be the total power in modulated wave?

Long distance communication between two point on earth is achieved by

Assertion : In a communication system based on amplitude modulation the modulation index is kept < 1 . Reason : It ensures minimum distortion of signal.

The sound waves after being converted into electrical waves are not transmitted as such because

The sound waves after being converted into electrical waves are not transmitted as such because

Voltage of modulating wave of 5 ~V with 10 MHz frequency was superimposed on carrier wave of frequency 20 MHz and voltage 20 ~V then the modulation index is

The area covered by a transmitting antenna of height 50 ~m is

Assertion : In the transmission of long distance radio signals, short wave band is used. Reason : In shorter wavelength, attenuation is very less.

The principle of LASER action involves

Voltage of modulating wave of 5 ~V with 10 MHz frequency was superimposed on carrier wave of frequency 20 MHz and voltage 20 ~V then the modulation index is

The area covered by a transmitting antenna of height 50 ~m is

Assertion : In the transmission of long distance radio signals, short wave band is used. Reason : In shorter wavelength, attenuation is very less.

The principle of LASER action involves

Assertion : Communication in UHF/VHF regions can be established by space wave or tropospheric wave. Reason : Communication in UHF/VHF regions is limited to line of sight distance.

Assertion : Communication in UHF/VHF regions can be established by space wave or tropospheric wave. Reason : Communication in UHF/VHF regions is limited to line of sight distance.

Assertion : Diode lasers are used as optical sources in optical communication. Reason : Diode lasers consume less energy.

What maximum frequency can be reflected from ionosphere?

Assertion : Diode lasers are used as optical sources in optical communication. Reason : Diode lasers consume less energy.

What maximum frequency can be reflected from ionosphere?

If the highest modulating frequency of the wave is \(5 ~kHz\), the number of stations that can be accomodated in a \(150 ~kHz\) bandwidth ?

In communication with help of antenna if height is doubled then the range covered which was initially \(r\) would become

If the highest modulating frequency of the wave is \(5 ~kHz\), the number of stations that can be accomodated in a \(150 ~kHz\) bandwidth ?

In communication with help of antenna if height is doubled then the range covered which was initially \(r\) would become

Assertion : Electromagnetic waves with frequencies smaller than the critical frequency of ionosphere are used for communication using sky wave propagation. Reason : The refractive

Assertion : Electromagnetic waves with frequencies smaller than the critical frequency of ionosphere are used for communication using sky wave propagation. Reason : The refractive

For skywave propagation of a 10 MHz signal, what should be the minimum electron density in ionosphere?

Assertion : Television signals are received through sky-wave propagation. Reason : The ionosphere reflects electromagnetic waves of frequencies greater than a certain critical

For skywave propagation of a 10 MHz signal, what should be the minimum electron density in ionosphere?

Assertion : Television signals are received through sky-wave propagation. Reason : The ionosphere reflects electromagnetic waves of frequencies greater than a certain critical

The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to

In short wave communication, waves of which of the following frequencies will be reflected back by the ionospheric layer having electron density 10^ 11 per m^3 ?

Assertion : Microwave communication is preferred over optical communication. Reason : Microwaves provide large number of channels and bandwidth compared to optical signals.

The maximum distance upto which TV transmission from a TV tower of height h can be received is proportional to

In short wave communication, waves of which of the following frequencies will be reflected back by the ionospheric layer having electron density 10^ 11 per m^3 ?

Assertion : Microwave communication is preferred over optical communication. Reason : Microwaves provide large number of channels and bandwidth compared to optical signals.

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