# magnetic constant

> physical constant; ratio between the magnetic H-field and the magnetic B-field in classical vacuum

**Wikidata**: [Q1515261](https://www.wikidata.org/wiki/Q1515261)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Vacuum_permeability)  
**Source**: https://4ort.xyz/entity/magnetic-constant


## References

1. Freebase Data Dumps. 2013
2. CODATA recommended values of the fundamental physical constants: 2022
3. IEC 80000-6:2022 Quantities and units — Part 6: Electromagnetism
4. IEC 80000-6:2008 Quantities and units—Part 6: Electromagnetism