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दाखिल करना

Physics for IGCSE & O level - Rays And Waves (Section 10 - No. 48)

How does a speaker create sound?
By making a current oscillate in a transmitting antenna.
By making radio waves vibrate.
By producing a copy of the original sound.
By converting radio waves into electrical signals.

स्पष्टीकरण

A loudspeaker produces a copy of the original sound.

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