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The sound waves after being converted in...

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

A

they travel with the speed of sound

B

the frequency is not constant

C

they are heavily absorbed by the atmosphere

D

the height of antenna has to be increased several times

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The correct Answer is:
C
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AAKASH SERIES-COMMUNICATION SYSTEMS -Exercise - IA (Modulation)
  1. In amplitude modulation

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  2. Assertion: The units of some physical quantities can be expressed as c...

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  3. AM is used for broadcasting because

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  4. In amplitude modulation

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  5. The tuned circuit the Oscillator in a simple AM transmitter employs a ...

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  6. In frequency modulation

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  7. In a communication system, noise is most likely to affect the signal

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  8. The difference between phase and frequency modulation

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  9. While tuning in a certain broadcast station with a receiver, we are ac...

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  10. Digital signals (i) do not provide a continuous set of values, (ii) re...

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  11. An amino acid under certain conditions have both positive and negative...

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  12. Assertion: AM detection is the process of recovering the modulating si...

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  13. The sound waves after being converted into electrical waves are not tr...

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  14. In amplitude modulation

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  15. Modem is a device which performs

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  16. Audio signal canot be transmitted because

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  17. Of the following which is preferred modulation scheme for digital comm...

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  18. A basic communication system consists of (A) transmitter (B) informa...

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  19. Digital signals (i) do not provide a continuous set of values, (ii) re...

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  20. Identify the mathematical expression for amplitude modulated wave.

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