Question

What is earthing or grounding in physics ????

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Answer 1

Earthing is also know as grounding.Earthing means the transfer of charge to the earth is called earthing. Earthing is a physical connection between the electrical frequencies of the human body with that of earth.
Example: Bare foot in the grass or in the beach.
Earthing is a movement that taps into the electrical energy of the earth...
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Answer 2

Earthing OR Grounding !

If a charged body is kept in contact with the earth , by a conductor, the excess charge on the body disappers. Here that charge gets transferred into the earth. This process is known as Grounding or earthing.

Earthing is done for the safety of electrical appliances and circuits. The household electic wiring will have three wires which are known as live, netural and earth.
The first two carry electric current . The third wire is earthed by connecting it to a thick metal plate burried deep into the earth . Metallic bodies or surfaces of the electric appliances like TV, refrigerator etc... are connected to the earth wire . If live wire touches the metallic body by fault, the charge flows to the earth without damaging that appliance. This prevents the injury to the person in contact with the appliance also.