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CHETANA PUBLICATION-ELECTROMAGNETIC WAVES AND COMMUNICATON SYSTEM-EXERCISE
- Why are high frequency carrier waves used for transmission of audio si...
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- The EM wave emitted by theSun and responsible for heating the Earth's ...
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- Choose the correct options. Earth's atmosphere is rechest in
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- How does the frequency of a beam of ultraviolet light change when it t...
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- The direction of EM wave is given by
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- The maximum distance upto which TV transmission from a TV tower of he...
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- The waves used by artificial satellites for communication purposes are
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- If a TV telecast isto cover a radius of 640 km, what should be the hei...
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- In a communication system, noise is most likely to affect the signal.
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- For television broadcasting , the frequency employed is normally
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- A device that converts one form of energy into another form is termed ...
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- The process of regaining the information from carrier wavesis called.....
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- The outermost layer of the earth's atmosphere is........
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- The antenna behaves as resonant circuit only when its length is..........
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- The difference between the upper and lower frequency limits of the sig...
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- The layer that adsorbs largest proportion of UV rays is
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- Speed of electromagnetic waves is given
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- The lower layer of the earth's atmosphere is called.
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- Which of the following is NOT a part of electromagnetic spectrum?
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- Operators working on X-ray equipment have a chance of getting skin dis...
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