‘The age of electromagnetism—the power of attraction’ shows how electromagnetism is used to perform work. It was Faraday who first showed that electromagnetism could perform work. Eighteenth century experiments led to the understanding of various electromagnetic principles, and there were many disputes over whether alternating or direct current was the superior form of electricity. The development of the transformer allowed the voltage of AC power to be modified, which led to the development of national grids to provide power over large distances. Breakthroughs by Marconi, Bell and Edison led to the development of wireless communications, telephony and sound recording.