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The sound waves after being converted in...

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

A

they travel with the speed of the sound

B

the frequency is not constant

C

they are heavily absorbed by the atmosphere

D

they have different frequencies

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CHETANA PUBLICATION-ELECTROMAGNETIC WAVES AND COMMUNICATON SYSTEM-EXERCISE
  1. The special infrared photograph of the body to see diseased parts is c...

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  2. In the diagnosis of superficial tumours and varicose veins which of th...

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

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  4. Choose the correct options. Earth's atmosphere is rechest in

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  5. Choose the correct options. A device that converts one form of energ...

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  6. Choose the correct options. Ultraviolet rays can NOT pass through ...

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  7. Choose the correct options. The radio waves from..... are called spa...

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  8. What is modulation?

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  9. Name the most harmful radiation entering the earth's atmosphere from t...

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  10. Does an ordinary electric lamp emit EM waves?

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  11. What are the different types of electro magnetic waves ?

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  12. What is meant by noise?

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  13. Calculate the wavelength in nm of an X-ray wave of frequency 2 xx 10^1...

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  14. In a EM wave the electricfield usallate sinusoidally at a frequency of...

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  15. Give reason for the following, satellite are used for long distance TV...

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  16. What are radio waves? Give its two uses

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  17. What are micro wave? Give its two uses.

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  18. Explain why is modulation needed.

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  19. Define : Signal

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  20. Define : Transmitter

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