Beakman's World: History of Magnets
Beakman explains the history behind magnets and the difference between magnets and electromagnets. They then walk through making an electromagnet and demonstrate that the magnetic energy in the nail comes from the battery and isn't inherent in the nail. Beakman explains that the inherent energy separates electromagnets from regular magnets. Beakman then mentions some ways in which electromagnets are used in the world today.