Which microphone component moves to generate an electrical signal in a dynamic microphone?

In a dynamic microphone, the diaphragm plays a crucial role in generating an electrical signal. The diaphragm is a thin, flexible membrane that responds to sound waves. When sound waves hit the diaphragm, it vibrates. These vibrations are then transferred to a coil that is located within a magnetic field. As the coil moves within this magnetic field, it induces an electrical current, which corresponds to the sound waves. This principle, known as electromagnetic induction, is what allows the dynamic microphone to convert sound into an electrical signal for recording or amplification.

Choosing this option reflects an understanding of the fundamental working mechanism of dynamic microphones, highlighting the essential interplay between sound waves and the microphone's internal components to produce audio signals.