Transformer (device)
From Tardis Wiki, the free Doctor Who reference
A transformer was an electrical device that changed the voltage of an alternating current supply, the AC supply, such as the mains electrical supply on Earth. The first transformer was invented by Michael Faraday. However, Luke Smith observed that Faraday did not know what he invented, and that one could get rid of the transformers, get a better system and induct power instead. (TV: Revenge of the Slitheen)
