Synonyms for the term "Oudin current" refer to a type of electrical phenomenon known as the Oudin resonance. This electrical resonance occurs in circuits with high-voltage alternating current (HVAC) transformers. The Oudin resonance is also synonymous with the "Tesla coil effect" or the "Oudin effect". These terms are named after renowned electrical engineer Paul Oudin, who extensively studied high-frequency transformers and resonant circuits. The Oudin resonance is characterized by the ability to transfer high voltages to low-voltage windings through resonance and is commonly used in applications like wireless charging, electromagnetic research, and medical equipment. Understanding these synonyms enhances our comprehension of this fascinating electrical phenomenon.