What are the two components utilized by a Dynamic speaker to create movement?

In a dynamic speaker, the two key components that work together to create movement are the voice coil and the magnet. The voice coil is a coil of wire attached to the speaker's diaphragm that moves in response to an audio signal. When an electric current flows through the voice coil, it generates a magnetic field due to its own electrical properties. This magnetic field interacts with the static magnetic field produced by the magnet, causing the voice coil—and consequently the diaphragm attached to it—to move back and forth. This movement produces sound waves by compressing and rarefying the surrounding air.

The magnet is critical as it provides a consistent magnetic field that allows the voice coil to react dynamically to the audio signals. This entire process is essential for converting electrical energy into mechanical energy, which is then transformed into audible sound.

Other options contain components that are not directly responsible for the primary movement mechanism in a dynamic speaker. Capacitors, for example, may be involved in other types of circuitry but do not directly facilitate movement. Similarly, transducers and phase plugs relate to sound transformation and directivity but do not play a role in the basic operation of generating sound via the movement of a diaphragm in a dynamic speaker.