Why is the Ampere the fundamental SI unit concerning electric phenomenon, and not the Coulomb?
You have a very great thought. One answer I can think of is that scientists care a lot about transfer of energy in terms of electricity. Current reflects off of that based upon transfer of charge (and energy too) over a period of time. A Coulomb is nothing but a scalar quantity. It has magnitude, but no direction. However, I’m also looking at what you said about units such as Farads being very large. That’s very true. Coulombs are large, Teslas are large, Farads are large, and Amperes are large. Ususally quantiities in electromagnetism are small, yet I do not know why large units are SI units. Overall, I honestly don’t know why scientists choose certain units to be the SI units. Its possible that other units have been rejected for whatever reason, even if they made more sense. Anyways, I do hope that you find an answer to your question one day.
