Question

Identify and encircle the correct option of the working principle for loud speakers among the three...

Identify and encircle the correct option of the working principle for loud speakers among the three given below choices? Explain the working principle of loud speakers.                                                  
     
Fm= BILSin    -.........................................................................................
Fm= B q v Sin-..........................................................................................
Ʈ= BINA Sin -...........................................................................................

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Answer #1

Fm = BILsin

where B is the magnetic field produced by magnets in a loud speaker and I is current passing through coil and L is the length of coil.

we know that a current-carrying wire in a magnetic field experiences a magnetic force perpendicular to the wire. The same principle is used in loudspeakers.

The moving cone of a speaker is attached to the coil. The current passing through this coil through AC interacts with the magnetic field of magnets in a loudspeakers which makes the coil vibrate back and forth. This vibration then interacts with air molecules around and produces sound.

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