How is sound produced in a loudspeaker? [3 Marks]

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Solution

Production of sound in loudspeaker :

When variable current flows through the coil, the magnetic field is produced around it due to electromagnetism and it behaves like an electromagnet.

Because of this, the coil is repelled and attracted by the permanent magnet alternately.

The screen attached to the coil moves back and forth due to the attraction and repulsion of the coil and hence, produces sound.

[3 Marks]

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