Posted on March 12, 2011 by amshRelative magnetic permeability Relative magnetic permeability is defined as the ratio of permeability of medium (μ) to the permeability of free space (μ0) μr = μ/μ0 or μr = B/H/(B0/H) or μr = B / B0 is permeability of free space. Post Views: 63 Share and Like article, please: