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10Audio frequency is much less than radio frequency.
Carrier signals are less powerful than audio signals.
Modulation is the process of changing the amplitude or frequency of a carrier wave according to the audio signal.
Demodulation is the process of extracting information from the carrier wave.
FM waves reflect easily from the ionosphere.
AM waves are affected by the environment and are heard better at night.
Frequency modulation changes the amplitude of the carrier wave.
AM radio in Kathmandu is broadcast at 792 kHz.
FM radio waves have lower frequency than AM radio waves.
Modulated waves can be broadcasted through radio, TV, and routers.
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What is the main reason modulation is used in radio communication?
Which type of modulation changes the amplitude of the carrier wave?
Which type of modulation changes the frequency of the carrier wave?
FM waves are generally:
Which radio wave type is affected more by environmental changes?
Carrier signals are:
AM waves can be reflected by:
Which process converts carrier waves into usable information at the receiver?
AM radio in Kathmandu broadcasts at which frequency?
Why are FM radio waves not reflected by the ionosphere like AM waves?
Highly energetic ______ are used to broadcast signals in a wide area.
The process of changing carrier wave according to audio signal is called ______.
The process of extracting information from carrier waves is called ______.
In AM radio, the ______ of the carrier wave is changed.
In FM radio, the ______ of the carrier wave is changed.
Frequency range of AM radio is ______ kHz to ______ kHz.
Frequency range of FM radio is ______ MHz to ______ MHz.
Radio waves are ______ waves.
Modulated waves are broadcasted through various ______.
FM waves are suitable for ______ broadcasting.