Question

lightning arrester is based on the principle of
a)Gausian law
b)electrostatic induction
c)action of point
d)both b and c​

Answer 1

Answer:

electrostatic induction

Explanation:

electrostatic induction

Answer 2

B)- Electrostatic induction

• A lightning arrestor is a protection device that is responsible for protecting the electrical devices of our homes from lightning surges and strikes as its role is to divert or deviate the electricity passed from the lightning usually towards the ground or the Earth surface.
• The construction of the lightning arrestor helps in this process as the protection device consists of a lengthy copper rod connected to a sharp needle that extends all the way from the top of the building to the Earth.
• The arrester works on the principle of electrostatic induction and as we know the cloud that produces the lightning would be negatively charged.
• This results in the spike or the sharp needle to get induced to positive charge along its surface and the positive density increases to a point where the charge ionizes the air surrounding the spike. This is often known as corona discharge.
• This in-turn results in the air to neutralize the negatively charged cloud by inducing the positive charge from the sharp needle.
• The electrons that are squeezed onto the needle travel down along the copper rod and gets deposited or collected at the copper plate that is attached to the lower part of the copper rod that is located deep down in the ground.
• This way all the surges from the lightning strike are diverted to the ground without being absorbed or prevented completely.

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