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Lightning Conductors

If lightning ...

Question

If lightning strikes a building, it flows harmlessly through the lightning conductor. What property should the material of which the lightning conductor is made have, to make this possible?

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Solution

The lightning conductor is made of a metal rod ending in spikes at the top which is connected to a copper plate buried deep inside the ground. If lightning strikes a building the metal rod attracts the excess of charge and pass it to the ground.

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Q. If the materials used for constructing a building were good conductors, do you think lightning will strike the building? Will the lightning conductor be still required to be installed in the building?

Q. Lightning conductors are used to protect building from lightning strikes. Which of the following statements is / are true about lightning conductors?
1. Lightning conductors create an electric field at its top so that lightning strikes it preferentially
2. Lightning conductors reduce the effect of the strike by uniformly distributing the charge (current) over the surface of the building
3. Lightning conductors take all charge (current) to deep down in the earth
4. Lightning conductors must be installed at a place taller than the building
Select the correct answer using the code given below:

(a) Name the material of which a lightning conductor is made.

(b) What is the shape of the top end of a lightning conductor ?

(c) Where is the upper end of the lightning conductor fixed in a building ?

(d) Where is the lower end of the lightning conductor fixed and how ?

Q. The material of which the lightning conductor is made up of is

Q. Other than lightning conductor, what are the objects which indirectly protect building from lightning / thunderstorm?

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