Ruhmkorffs
Ruhmkorffs, often referred to as Ruhmkorff coils, are a type of transformer used to produce high-voltage, low-current, high-frequency alternating current electricity. They were invented by the German physicist Heinrich Wilhelm Dove in 1850 and later significantly improved by the French electrical engineer Nicolas Callan in 1851, though they are primarily named after German instrument maker Heinrich Daniel Ruhmkorff, who commercialized and refined the design in the 1850s.
The basic principle of a Ruhmkorff coil involves two coils of wire wound around a common iron
Ruhmkorff coils were crucial for early electrical experiments, particularly in the study of electricity and magnetism,