The relation between absolute permeability, μ and relative permeability μr of a material is given by:

(Given μo is absolute permeability of air)

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RRB JE EE 22 Apr 2025 Shift 1 CBT 2 Official Paper
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  1. μ = μr

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Concept

The relation between absolute permeability and relative permeability of a material is given by:

where, μo = Permeability of vacuum

μr = Relative permeability of the material

μ = Magnetic permeability

The value of the permeability of a vacuum is 4π  × 10-7 H/m

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