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The.....% of the solar radians are infra...

The.....% of the solar radians are infrared in nature.

A

25

B

30

C

60

D

80

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CHETANA PUBLICATION-ELECTROMAGNETIC WAVES AND COMMUNICATON SYSTEM-EXERCISE
  1. Which of the following waves are not electromagnetic waves?

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  2. Electromagnetic waves were first produced in the laboratory by

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  3. The.....% of the solar radians are infrared in nature.

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  4. Ultraviolet rays can NOT pass through

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  5. The air in the stratosphere contains

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  6. Which of the following statements is NOT CORRECT?

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  7. The radio waves reflected from.......are called space wave.

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  8. The special infrared photograph of the body to see diseased parts is c...

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

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

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

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

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

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

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  15. What is modulation?

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

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  17. Does an ordinary electric lamp emit EM waves?

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

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  19. What is meant by noise?

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

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