9. What is earthing? Why earthing is necessary in household circuits?
Answers
Answer:An earthing system or grounding system connects specific parts of that installation with the Earth's conductive surface for safety and functional purposes.
It is necessary because:
•it helps to protect from electric shock by keeping the exposed conductive surface of connected devices close to earth potential, when a failure of electrical insulation occurs.
•A functional earth connection serves a purpose other than electrical safety, and may carry current as part of normal operation.
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Answer:
Explanation:
Earthing is defined as “the process in which the instantaneous discharge of the electrical energy takes place by transferring charges directly to the earth through low resistance wire.” Low resistance earthing wire is chosen to provide the least resistance path for leakage of fault current.Earthing is used to protect you from an electric shock.
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