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

a

inductance

b

resistance

c

capacitance

d

voltage

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Correct Option
b

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afolabt1234
4 years ago

The basic concept behind the carbon microphone is the fact that when carbon granules are compressed their resistance decreases. This occurs because the granules come into better contact with each other when they are pushed together by the higher pressure.

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