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Q35. What is lightening arrestor and why is it necessary?

Ans : Lightening arrestor is a conductive metal device mounted at the highest point on the tower. Tall objects like microwave tower are prone to damage by lightening strikes. The lightening strike occures due to induction effect between a charged cloud and the tower. To prevent the tower from lightening strike, a lightening arrestor is fitted on top of tower. This lightening arrestor or air electrode is connected to earth electrode through a conducting wire or strip. For details see Lightening