volt second [V*s] Unit Converter

Definition of volt second [V*s] unit

The volt-second (V·s) is the SI-derived unit of magnetic flux. One volt-second equals one weber and represents the flux produced when an electromotive force of one volt acts continuously for one second.

History of volt second [V*s] unit

The volt-second arose from the relationship between electromagnetic induction and magnetic flux, formalized through Faraday’s law in the nineteenth century. Although the weber became the SI’s named unit of flux, volt-second remains an equivalent compound expression because induced voltage equals the rate of change of flux. The term reflects practical measurement: integrating voltage over time gives flux change. Electrical engineers have long used volt-seconds when analyzing transformers, inductors, and switching circuits, while modern SI guidance recognizes the exact equivalence, 1 V·s = 1 Wb.

Applications of volt second [V*s] unit

The volt-second is used to quantify magnetic flux changes in transformers, inductors, motors, generators, and electromagnets. For example, integrating a transformer’s induced voltage over a switching interval determines changes in core flux. Designers also use volt-second balance to prevent transformer saturation in power converters. Oscilloscope and sensor systems may report voltage-time integrals in volt-seconds when characterizing magnetic components.

Complete list of volt second [V*s] unit conversion