The permeability of a vacuum is:

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MPMKVVCL Bhopal JE Electrical 24 August 2018 Official Paper
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  1. 0 H/m
  2. 1 H/m
  3. 4π × 10-10 H/m
  4. 4π  × 10-7 H/m

Answer (Detailed Solution Below)

Option 4 : 4π  × 10-7 H/m
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Detailed Solution

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Vacuum permeability

It is the ratio of magnetic permeability to the relative permeability of the material.

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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