Question

Microphone is a device in which the
(A) Electrical energy is converted into sound waves directly
(B) Sound waves are directly transmitted
(C ) Sound waves are converted into electrical energy and then reconverted into sound after transmission.
(D) Amplification is not required at all

Answer 1

Hint : In the case of a microphone a form of energy conversion takes place. That is the sound waves are converted into an electrical signal. The signal can either be digital or analog. Thus we can define Microphone as a device in which the captured audio of sound waves are converted into electrical energy

Complete step-by-step solution:
Microphone is a device in which the captured audio of sound waves is converted into electrical energy. The given signal can be amplified as an analog signal or it can be converted into digital signals and that can be processed by using a computer or some digital audio device.
There are multiple classes of microphones used. They are dynamic, condenser, ribbon etc. Among them the Dynamic microphones are the most widely used one. It has a simple design that includes a magnet wrapped by a coil. The coil used is a type of metal. A thin sheet of diaphragm is also placed in the front of the magnet to transmit the vibrations from sound waves.
Therefore option (C ) is correct.

Note: Also remember that the most widely used durable microphone is dynamic microphone. And also note that it is simple to design. And the dynamic microphone does not require electrical power. Whereas the condenser is used for the recording purposes.