The second half of a 52-part, introductory level physics course presented in laserdisc format (for the first half see AV#s 60957-60969). Each disc contains two 30-minute programs. Program 37. The discovery of electromagnetic induction in 1831 creates an important technological break-through in the generation of electric power. Program 38. Electromagnetic induction makes it easy to generate alternating current while transformers make it practical to distribute it over long distances. Video: CAV. Audio: A nalog.