# Alfvén's Theorem

> theorem in magnetohydrodynamics that electrically conducting fluids and embedded magnetic fields are constrained to move together in the limit of large magnetic Reynolds numbers

**Wikidata**: [Q25303782](https://www.wikidata.org/wiki/Q25303782)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Alfvén's_theorem)  
**Source**: https://4ort.xyz/entity/alfv-n-s-theorem