Q-- Give reasons.
(i) Lightning is considered to be life-threatening,
(ii) Skyscrapers are provided with a lightning conductor.
(iii) A gold leaf electroscope is used to detect a charge on a body.
(iv) A charged body loses its charge if we touch it with our hand.
Answers
Explanation:
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Answer:
Answer:(ILightning is a major cause of storm related deaths in the U.S. A lightning strike can result in a cardiac arrest (heart stopping) at the time of the injury, although some victims may appear to have a delayed death a few days later if they are resuscitated but have suffered irreversible brain damage.
(ii) Lightning strikes taller things more frequently. A lightning rod positioned at the top of a building, along with a conductor connecting it to the ground provides a path for the energy in a lightning strike to be funneled into the ground, bypassing the building, preventing damage to people and property.
(iii) A gold-leaf type electroscope is a device used to detect the presence of electric charge on a body and its relative amount. The electroscope is usually constructed with a metal plate or sphere at the top of a metal post (electrode) with thin foil leaves (e.g., gold) hanging from the bottom of the post.
(iv) Human body is a conductor of electricity. So, when we touch a charged object, our body conducts its charges to the Earth. That is why a charged body loses its charge, if we touch it with our hand. This phenomenon is known as earthing.
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