EntityQ1515261· pop 31· linked from 138 articlesmagnetic constantSign in to savephysical constant; ratio between the magnetic H-field and the magnetic B-field in classical vacuumConnectionsvacuumEntitymetreEntitymagnetic permeabilityEntityNational Institute of Standards and TechnologyEntityInternational Union of Pure and Applied PhysicsOrganizationCommittee on Data for Science and TechnologyEntityredefinition of SI base unitsEntitytimeEntityforceEntitysecondEntitymassEntityInternational Standard Book NumberEntitykilogramEntityInternational System of UnitsEntityelectric currentEntityspeed of light in vacuumEntitylengthEntitymagnetic fieldEntityelectromagnetic radiationEntityampereEntityCategoriesFundamental constants