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MBD -HARYANA BOARD-PRINCIPLES OF COMMUNICATION-Objective Type Questions
- The sky wave propagation is suitable for radiowaves of frequency
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- INSAT-IA satellite is used for :
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- A TV tower of height h can broadcast program upto a distance ( given r...
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- In UHF range the frequencies are propagated by means of :
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- The diameter of an optical fibre is :
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- In the process of modulation, the radio frequency wave is known as
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- Ozone layer in atmosphere is useful because it :
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- The height of a T.V. tower is 100m. If radius of earth is 6400km, then...
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- The most commonly used system of modulation for telegraphy is :
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- Ionosphere can reflect which type of waves ?
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- For television transmission, the frequency employed is normally in the...
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- The electromagnetic waves used in the telecommunication are
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- the attenution in optical fibre is mainly due to
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- The output from a LASER is monochromatic. It means that it is :
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- Radio waves of frequency 300MHz-3000MHz belongs to :
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- A TV tower has a height of 100m. By how much the height of tower be in...
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- Radio waves of constant amplitude can be generated with:
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- Radio waves are reflected from which layer of atmosphere ?
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