In frequency modulation (FM), which statement correctly describes how the signal

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1. In frequency modulation (FM), which statement correctly describes how the signal is modulated?

The modulated wave’s amplitude varies with the carrier wave’s frequency

The modulated wave’s frequency varies with the modulating (audio) signal’s amplitude

The modulated wave’s frequency varies with the modulating signal’s own frequency

The modulated wave’s frequency varies with the carrier wave’s own frequency

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In FM, it’s specifically the amplitude of the audio signal that determines how much the carrier’s frequency shifts — a stronger audio signal produces a larger frequency deviation.