Check out Thomas Piketty's 'Capital in the 21st Century'. Relevant part is that wealth distribution was at its most equitable from ~1945 to 1980, after which nearly all new wealth generated from increased production (i.e. computing/internet/tech/etc) was captured by the top 10% of earners, and within that 10% it's crazy skewed towards the 0.000001%.
For the fundamental concepts of electromagnetism, see 'Maxwell's Equations'. Personally, I prefer looking at the differential equation versions to understand the interplay between electro- and -magnetism and how that relates to light/electricity/so many things
Yep electrons travel at VERY different speeds through different materials. For instance, in certain semiconductors they can travel millions of times faster than in copper wire, which is why they are used for power amplification. But even in those, a single electron does not travel very far, relative to the distance we transport 'electricity' through wires and such.
your comment is dumb af homie