In amplitude modulation (AM), the transmission bandwidth needed is approximately

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1. In amplitude modulation (AM), the transmission bandwidth needed is approximately?

Twice the audio signal’s frequency

Three times the audio signal’s frequency

Twice the carrier wave’s frequency

The sum of the audio signal’s and carrier wave’s frequencies

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AM transmission produces two sidebands around the carrier frequency, each offset by the audio frequency, so the total bandwidth needed works out to roughly twice the audio frequency.