Question

In SI units, the value of the constant μ₀/4π is:

Options

• \[10^{-7}\ \text{T m/A}\]

• \[10^{-7}\ \text{N A}^{-2}\]

• \[4\pi \times 10^{-7}\ \text{T m/A}\]

• \[9 \times 10^{9}\ \text{N m}^2/\text{C}^2\]

Answer 1

The proportionality constant has the exact value μ₀/4π = 10⁻⁷ T m/A in SI units. It is simply a constant needed to make the units work out correctly in the SI system.