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44 questions
31
Wave motion
Moderate
+1.0
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The waves used in common TV remote control are
32
Wave motion
Moderate
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Which type of electromagnetic radiation is used in the remote control of a television?
33
Wave motion
Moderate
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Which electromagnetic radiation is used in remote control of a television?
34
Wave motion
Moderate
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Which one of the following does a TV remote control unit use to operate a TV set ?
35
Wave motion
Moderate
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Waves used for telecommunication are–
36
Wave motion
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The process of superimposition of any information on radio waves is named as :
37
Wave motion
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What is not true about FM (Frequency Modulation) radio waves?
38
Wave motion
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FM broadcasting service uses the range of frequency bands between –
39
Wave motion
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A radio station broadcast at 30 metre band. The frequency of the carrier wave transmitted by this station is–
40
Wave motion
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A layer in the Earth's atmosphere called Ionosphere facilitates radio communication. Why? 1. The presence of ozone causes the reflection of radio waves to Earth. 2. Radio waves have a very long wavelength.