EngiRef / Electromagnetic Constant
Vacuum Permeability
Vacuum Permeability (μ₀) = 1.2566 × 10^-6 H/m. Magnetic constant. Since the 2019 SI redefinition μ₀ is a measured quantity; 4π × 10⁻⁷ H/m is the pre-2019 exact…
electromagneticμ₀
Specification
- Name
- Vacuum Permeability
- Symbol
- μ₀
- Value
- 1.2566 × 10^-6
- Unit
- H/m
- Category
- electromagnetic
- Description
- Magnetic constant. Since the 2019 SI redefinition μ₀ is a measured quantity; 4π × 10⁻⁷ H/m is the pre-2019 exact value and now differs in the 10th digit.