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Q34. What is earthing and why is it necessary?

Ans : Earthing or Grounding an object/tower means providing an electrical connection between that object/tower and mother earth. This electric connection is achieved by running an electrical wire/strip between the tower and an earth electrode. Earth electrode is a metal plate/pipe/sphere properly embedded at a depth in the earth. This Earthing/Grounding of tower is necessary to :

a) Prevent damages to delicate instruments or humans due to stray voltages/currents

b) For optimum performance of the communication system.