21. Maxwell considered magnetic permeability " ?" to be a measure of the density of the vortex sea. 22. It is also assumed that the magnetic permeability ,, of both media is equal to the permeability of free space. 23. Holmium has the highest magnetic permeability of any element and therefore is used for the polepieces of the strongest static magnets. 24. The inductance of a circuit depends on the geometry of the current path as well as the magnetic permeability of nearby materials. 25. The required increase in " L " is achieved by loading the cable with a metal with high magnetic permeability . 26. These compounds, even in particles as small as one micrometer in diameter, increase hysteresis losses while also decreasing magnetic permeability . 27. This medium is a dielectric with relative dielectric constant > 1, and is diamagnetic, with relative magnetic permeability < 1. 28. The symbol " ? " has been used in some texts for magnetic permeability and in other texts for magnetic moment. 29. The magnetic permeability of vacuum is 4? ?10 " 7 H?" m " 1 ( henry per metre ). 30. :: Several websites claim that " " Refractive index is proportional to the square roots of electrical permittivity and magnetic permeability .
