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To prevent damage from lightning, lightning conductors are used on tall structures. The lightning conductor
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- should be made of a good conductor but can be of any shape
- should be in the form of a vertical rod
- can be of any shape
- should be made of a good conductor like copper with sharp-pointed edges
- should be made of a good conductor but can be of any shape
Correct Option: D
A lightning conductor is made up of a sharp pointed metal (usually copper metal, as it is a very good conductor) connected directly to the ground. It is placed higher than the roof so that if lightning strikes, it strikes the conductor before it can reach the house. It should be pointed because when the negative charge is discharged by the cloud, it will first strike the pointed tip of the lightning conductor and quickly travel to the earth. The discharge will be quickly over and the house and its surroundings will be saved from damage. The pointed nature of the lightning conductor helps it to acquire more number of positive charges on its tip.
