What is a ground? What is a happening to need a ground?
In: Physics
In Circuits 101, ground is the exact middle point between positive and negative in a circuit. Positive pushes and negative pulls and the ground area is where the current (moving electricity) stops being pushed and starts being pulled.* Since the positive and negative have equal strength, the voltage (electricity force) measured in that area is 0.
In engineering, the current is never supposed to make it to “ground” ideally. That’s because the “ground” in this context is actually an emergency exit current takes to avoid danger when something goes wrong. Instead the role of midpoint is played by something called the neutral wire.
*technically, current is being pushed and pulled at the same time always, but the other stuff that goes on in circuits makes this more complicated.
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