Grounding is a grounding system that serves to negate the potential difference so that if there is a voltage or current leak it will be directly discharged to earth. In a ground electronic system means a general reference point or potential voltage equal to "zero voltage".
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Ground is relative, because it can choose any point in the circuit to be grounded to reference all voltages in the circuit. The ground also serves to neutralize defects (noise) caused by either poor power, or the quality of nonstandard components. The grounding system in electrical and electronic equipment is to provide protection for the entire system.
