Key learning points Electrical charges What are free electrons? Cell polarity Conventional current direction Electrons orbit the nucleus. An atom has a neutral charge, because it contains the same ...

Battery experts have noticed that the 4680 cells have three electrical terminals, one more than other round cells used in electric vehicles today. This is puzzling, although some think Tesla might use ...

What is resistance? The most common definition of resistance is the opposition to current flow—more specifically the flow of electric charge in a material. The circuit element used to model this ...