If we know that in reality electrons flow from negative to positive, then why is the negative terminal of a battery usually still connected as the ground, and things such as switches usually connect in series to the positive side?
In: Physics
You can call anything in a circuit “ground”. “Ground” is just a reference point.
Ground can be anywhere in the circuit, but it is usually near the power supply, because current going into or coming out of ground needs to go somewhere.
None of this has anything to do with the direction that electrons move. Grounding, battery directions, and switch connections are decided by three things:
What is convenient, what is necessary, and if it doesn’t matter then a choice is arbitrary. “The real direction of electrical flow” is none of these things.
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