Induction coil 100mm Spark

Induction coils work on the principle of mutual induction, which states that a changing magnetic flux in a coil will induce an emf or current in a second coil. 

Induction coils are made of insulated wires wrapped around a core, which can be made of magnetic materials or air. 

An induction coil’s primary coil has a low voltage direct current (DC) that’s repeatedly interrupted by a vibrating contact. This creates a changing magnetic field that induces a high voltage in the secondary coil. 

Induction coils have been used in many applications, including x-ray machines, spark-gap radio transmitters, arc lighting, and internal combustion engines. They’re also used in physics education to demonstrate induction. 

The induction coil was invented in 1836 by Irish-Catholic priest Nicholas Callan and American inventor Charles Grafton Page. It was the first type of transformer. 

Induction coils are also known as “spark coils”.