I think it should also be possible with electro magnetism. By first defining the sign convention for electron flow and then deriving left hand and right hand ru

I think it should also be possible with electro magnetism. By first defining the sign convention for electron flow and then deriving left hand and right hand rules of magnetism or something like that. It’s a bit tricky to explain the sign convention, but I think if one sticks with the movement of elementary particles, it should work.