NEET Physics Communication System MCQs

    Prepare for NEET Physics Communication System with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert guidance to understand signal transmission and reception.

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    Communication Systems
    91.

    The radio waves of frequency 30 MHz to 300 MHz belong to

    A

    High frequency band

    B

    Very high frequency band

    C

    Ultra high frequency band

    D

    Super high frequency band

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Electromagnetic Spectrum, Radio Frequency Bands
    92.

    The radio waves of frequency 30 MHz to 300 MHz belong to

    A

    High frequency band

    B

    Very high frequency band

    C

    Ultra high frequency band

    D

    Super high frequency band

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :electromagnetic spectrum, radio frequency bands
    93.

    Which of the following is the disadvantage of FM over AM

    A

    Larger band width requirement

    B

    Larger noise

    C

    Higher modulation power

    D

    Low efficiency

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Frequency Modulation (FM), Amplitude Modulation (AM), Bandwidth
    94.

    Which of the following is the disadvantage of FM over AM

    A

    Larger band width requirement

    B

    Larger noise

    C

    Higher modulation power

    D

    Low efficiency

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Frequency Modulation (FM), Amplitude Modulation (AM), Bandwidth, Communication Systems
    95.

    The electron density of E,β€…β€ŠF1,F2E,\;{F_1},{F_2} layers of ionosphere is 2imes1011,β€…β€Š5imes10112 imes {10^{11}},\;5 imes {10^{11}} and 8imes1011mβˆ’38 imes {10^{11}}{m^{ - 3}} respectively. What is the ratio of critical frequency for reflection of radiowaves

    A

    2:5:8

    B

    1:2:3

    C

    7:11:14

    D

    3:6:9

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Critical frequency, Ionosphere, Electron density, Radio wave reflection
    96.

    The electron density of E,β€…β€ŠF1,F2E,\;{F_1},{F_2} layers of ionosphere is 2imes1011,β€…β€Š5imes10112 imes {10^{11}},\;5 imes {10^{11}} and 8imes1011mβˆ’38 imes {10^{11}}{m^{ - 3}} respectively. What is the ratio of critical frequency for reflection of radiowaves

    A

    2∢4∢3

    B

    4∢3∢2

    C

    2∢3∢4

    D

    3∢2∢4

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Critical frequency, Electron density, Ionosphere
    97.

    A laser beam of pulse power 1012β€…β€ŠW{10^{12}}{\rm{\;W}} is focused on an object of area 10βˆ’4β€…β€Šcm2.{10^{ - 4}}\;{\rm{c}}{{\rm{m}}^2}. The energy flux in Watt cmβˆ’2{\rm{c}}{{\rm{m}}^{ - 2}}. The energy flux in Watt cmβˆ’2{\rm{c}}{{\rm{m}}^{ - 2}} at the point of focus is

    A

    1020{10^{20}}

    B

    1016{10^{16}}

    C

    108{10^8}

    D

    104{10^4}

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Power, Area, Energy Flux
    98.

    A laser beam of pulse power 1012β€…β€ŠW{10^{12}}{\rm{\;W}} is focused on an object of area 10βˆ’4β€…β€Šcm2.{10^{ - 4}}\;{\rm{c}}{{\rm{m}}^2}. The energy flux in Watt cmβˆ’2{\rm{c}}{{\rm{m}}^{ - 2}}. The energy flux in Watt cmβˆ’2{\rm{c}}{{\rm{m}}^{ - 2}} at the point of focus is

    A

    1020{10^{20}}

    B

    1016{10^{16}}

    C

    108{10^8}

    D

    104{10^4}

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :1 mins
    πŸ”„Ncert Concepts :Energy flux, Power, Area
    99.

    An antenna is of height 500 m. What will be its range (Radius of earth is 6400 km)?

    A

    800 km

    B

    100 km

    C

    50 km

    D

    80 km

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :range of antenna, earth radius, approximation
    100.

    An antenna is of height 500 m. What will be its range (Radius of earth is 6400 km)?

    A

    800 km

    B

    100 km

    C

    50 km

    D

    80 km

    Question Tags

    πŸ“š Subject:Physics
    πŸ“‘ Chapter:Communication System
    🎯Topic:Communication Systems
    πŸŽ“ Ncert Level:Application
    🎯Difficulty :Medium
    ⚑ Time Required :2 mins
    πŸ”„Ncert Concepts :Radio wave propagation, Range of antenna, Earth's curvature

    Showing 91 to 100 of 211 entries

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