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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 highly 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 INSTITUTE ENGLISH-COMMUNICATION SYSTEMS -ASSIGNMENT SECTION A Objective (Only one answer)
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  4. Identify the mathematical expression for amplitude modulated wave

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  5. The distance between consecutive maxima and minima is given by-

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  6. Long distance short-wave radio broadcasting uses

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  7. Broadcasting antennas are generally

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  8. For television broadcasting, the frequency employed is normally

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

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  10. The process of superimposing signal frequency (i.e., audio wave) on th...

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  11. In an amplitude modulated wave for audio frequency of 500 cycles/secon...

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  12. If there were no atmosphere, the average temperature on the surface of...

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  13. A TV transmission tower has a height of 240m. Signals broadcast from t...

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  16. An audio signal of amplitude 0.1 V is used in amplitude modulation of ...

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  17. The frequency of amplitude modulated wave is equal to

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  18. The radio waves of frequency ranging from 2 MHz to 30 MHz are called

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  19. A device which connects one computer to another is known as

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