Loudspeakers and the Motor Effect: Converting Electric Currents into Sound Waves

The video tutorial explains how loudspeakers use the motor effect to convert electric currents into sound waves. It begins by describing the motor effect, where a current-carrying conductor experiences a force in a magnetic field. Using Fleming's left-hand rule, the direction of this force is determined. The tutorial then illustrates how loudspeakers apply this effect: a conducting coil with alternating current vibrates within a magnetic field, causing a diaphragm to move and generate sound waves. The frequency of these sound waves matches the alternating current's frequency.

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