Communication Systems

Bihar Board Class 12 · Physics · 17 past questions

1. Q1 2026 Set A

   'World Wide Web' was invented by

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2. Q2 2026 Set A

   The example of a broadcast mode of communication is

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3. Q3 2026 Set A

   In a communication system, a repeater is

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4. Q4 2025 Set D

   What type of wave is used in fibre optic communication?

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5. Q5 2025 Set D

   Which one of the following frequency ranges is used for TV transmission?

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6. Q6 2024 Set A

   The device which works of both modulation and demodulation is called

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7. Q7 2024 Set A

   Distance of communication satellite from the surface of the earth is

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8. Q8 2024 Set A

   Attenuation is measured in

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9. Q9 2023 Set F

   Which range of frequency is used in TV transmission?

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10. Q10 2023 Set F

    Waves of UHF frequency are generally transmitted as

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11. Q11 2021 Set A

    Which of the following is the frequency range for TV broadcasting ?

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12. Q12 2021 Set A

    Which of the following units is correct to measure attenuation ?

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13. Q13 2019

    The modulation index in amplitude modulation

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14. Q14 2019

    The height of TV tower at a certain place is 245m.The maximum distance up to which its programme can be…

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15. Q15 2018

    Meaning of "FAX" is…

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16. Q16 2017

    The height of a TV transmission tower at any place on the surface of the earth is 245m. The maximum distance…

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17. Q17 2017

    Explain modulation and write types of modulation.

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