Question

A carbon microphone is best used in a

• A. dynamo
• B. telephone
• C. transformer
• D. none of these

Answer 1

The correct option is B

telephone

1. On the phone, a carbon microphone is used.
2. A transducer is an electronic device that converts sound into electrical signals.
3. It consists of two metal plates separated by carbon granules, one of which is very thin and acts as a diaphragm while facing the speaker.
4. Therefore, a telephone uses a carbon microphone.

Hence, option B is correct.