How electric speakers work
The current-carrying conductor will be subjected to the magnetic field force in the magnetic field. Suppose we put a current-carrying wire in a uniform magnetic field. The direction of the wire is perpendicular to the direction of the magnetic field line in the magnetic field; it is through the coil of the alternating current signal. The movement in the magnetic field causes the diaphragm connected to the voice coil to vibrate, thereby causing the paper cone to vibrate, and then transmitting the sound wave through the air medium.