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Which one of the following converts sound waves into AF signals?

Which one of the following converts sound waves into AF signals? Correct Answer Microphone

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Construction: The microphone consists of a moving diaphragm and a fixed back plate form a parallel-plate capacitor, which is charged with a DC voltage.

Working: The sound waves hitting the microphone make the diaphragm vibrate. As a result, the capacitance varies, which causes voltage variations across the resistor that are proportional to the incident sound signal.

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