The diagram shows a loudspeaker. An alternating current signal is applied to the coil. What happens to the coil when the a.c. signal is applied?
Question 1 Report
The diagram shows a loudspeaker. An alternating current signal is applied to the coil.
What happens to the coil when the a.c. signal is applied?
Answer Details
When an alternating current flows through the coil of a loudspeaker, the coil experiences a force due to the interaction between its current and the permanent magnetic field. Because the current alternates direction, the force on the coil also alternates direction, causing the coil to vibrate back and forth rapidly. This vibration is transferred to the paper cone attached to the coil, which pushes and pulls the surrounding air to produce sound waves.
The frequency of vibration matches the frequency of the a.c. signal, reproducing the original sound.
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