The carbon-granules microphone works on the principle of change in

Assessment: JAMB UTME - Physics - 2002 Subject: Physics

Question 1 Report

The carbon-granules microphone works on the principle of change in
Answer Details
The carbon-granules microphone works on the principle of change in resistance. When sound waves enter the microphone, they cause the carbon granules to vibrate, which changes the resistance of the granules. This change in resistance produces an electrical signal that corresponds to the sound wave, which can then be amplified and transmitted through a speaker.

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