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CHETANA PUBLICATION-ELECTROMAGNETIC WAVES AND COMMUNICATON SYSTEM-EXERCISE
- Choose the correct options. Earth's atmosphere is rechest in
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- Choose the correct options. A device that converts one form of energ...
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- Choose the correct options. Ultraviolet rays can NOT pass through ...
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- Choose the correct options. The radio waves from..... are called spa...
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- What is modulation?
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- Name the most harmful radiation entering the earth's atmosphere from t...
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- Does an ordinary electric lamp emit EM waves?
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- What are the different types of electro magnetic waves ?
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- What is meant by noise?
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- Calculate the wavelength in nm of an X-ray wave of frequency 2 xx 10^1...
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- In a EM wave the electricfield usallate sinusoidally at a frequency of...
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- Give reason for the following, satellite are used for long distance TV...
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- What are radio waves? Give its two uses
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- What are micro wave? Give its two uses.
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- Explain why is modulation needed.
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- Define : Signal
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- Define : Transmitter
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- Define : Attennuation in communication
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- Explain ground waves, space waves and sky waves propogation
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- The height of a transmitting antenna is 68 m and the receiving antenna...
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