The coil has become a commonplace in electronics, used to supply high voltage to the front of television picture tubes, in a form known as the flyback transformer.

The device in question is an ignition coil from the Subaru Outback. It consists of a pair of high-voltage transformers, connected together, in a wasted-spark setup to run four-cylinder engines.

Books Received Published: 01 June 1911 Transformers: a Treatise on the Theory, Construction, Design, and Uses of Transformers, Autotransformers, and Choking Coils Nature 86, 442 (1911) Cite this ...

Using electromagnetic induction, a transformer transfers electrical energy between two or more coils to step voltage up or down ... explanation of transformer technology. Donald Trump to make ...