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Choose the correct statement:

1. In amplitude modulation the amplitude of the high frequency carrier wave is made to vary in proportion to the amplitude of the audio signal
2. In amplitude modulation the frequency of the high frequency carrier wave is made to vary in proportion to the amplitude of the audio signal
3. In frequency modulation the amplitude of the high frequency carrier wave is made to vary in proportion to the amplitude of the audio signal
4. In frequency modulation the amplitude of the high frequency carrier wave is made to vary in proportion to the frequency of the audio signal

Correct answer: In amplitude modulation the amplitude of the high frequency carrier wave is made to vary in proportion to the amplitude of the audio signal

Solution

The correct option accurately describes amplitude modulation, where the amplitude of the carrier wave changes in accordance with the amplitude of the audio signal, allowing the audio information to be transmitted effectively.

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