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प्रश्न
How is a tall building protected from damage due to lightning?
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उत्तर
We can protect a tall building from lightning by the use of LIGHTNING CONDUCTOR.
WORKING: When a charged cloud passes over the building induction takes place and opposite charge (negative) is induced on spikes of the conductor. Spikes being pointed (having very small area) cannot hold the charge and charge leaks into air and opposite charge in air and cloud cancel each other. Even if some charge remains on spikes it passes to earth from copper rod and the building is saved.
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