What is a ground? What is a happening to need a ground?
In: Physics
Ground can be any point in any circuit. Plenty of completely different grounds exist. The spot we call earth ground is where an eight foot copper clad steel rod is drive. The safety ground is what that third prong on every receptacle connects to. Ground for static electricity is often called the floor beneath your shoe.
Ground is any one point in a circuit. Take a cylinder (D or AA) battery. Either side of that battery can be called ground. It is simply the point from which everything else in a circuit is measured (referenced).
Some grounds may discharge a circuit. Other grounds will not because they are not part of that circuit. Plenty of grounds exist (even a virtual ground). There is no one ground. An honest technical discussion about a ground is always preceded by an adjective such as earth, digital, power, chassis, floating, analog, breaker box, logic, virtual, or safety ground. All are electrically different even if interconnected.
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