Statement I: The lightening conductor at the top of high building has sharp pointed ends.
Statement II: The surface density of charge at sharp points is very high resulting in setting up of electric wind.

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Both statements I and II are correct

Statement-I is correct and statement-II is incorrect

Statement-I is incorrect and statement-II is correct

Both statements I and II are incorrect

answer is A.

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Detailed Solution

A charged cloud induces opposite charge on pointed conductors. At sharp points of the conductor surface density of charge is very high and charge begins to leak from the pointed ends by setting up oppositely charged electric wind. This wind, when comes in contact with the charged cloud, neutralizes some of its charge lowering the potential difference between the cloud and the building. This reduces the chances of lightening striking the building [if the lightning strikes the building, the charge is conducted to the earth and the building remains safe].

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