Tall buildings and structures are the closest to the clouds. What safety precaution is taken to keep these structures safe from lightning? Explain how it works, in detail.
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EARTHING- Alternating current supplied to theloudspeaker creates sound waves in the following way: a current in the coil creates a magnetic field. ... repeatedly alternating the current direction makes the cone vibrate in and out. the cone vibrations cause pressure variations in the air - which are sound waves.
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