The modulting frequency is $5$ kHz and the carrier frequency is $100$ kHz. What is the band width of AM transmission?

0.5 k H z

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50 k H z

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5 k H z

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500 k H z

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Solution

The correct option is C $5 k H z$ .
The frequency band used for $A M$ radio is about $550$ to $1720 k H z .$
This is the range of carrier frequencies available.
The information transmitted is music and a talk which falls in the audio spectrum.
The full audio spectrum ranges up to $20 k H z$ , but $A M$ radio limits the upper modulating frequency to $5 k H z$ .

So, the correct answer is $^{'} 5 k H z^{'} .$

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