Experiments had already shown that the movement of electrical charges appeared to produce magnetic fields, but the exact mechanism behind this remained mysterious. It was Scottish physicist James ...

One coulomb of charge is a package equivalent to 6,250,000,000,000,000,000 electrons. Electrical current is the rate of flow of electric charge.

Key fact Electrical current is the rate of flow of electric charge. One ampere is the current that flows when one coulomb of charge passes a point in a circuit in one second. Key fact 'Amps' is an ...