Question

The value of ${\mu }_o$ is __________.

• A. $2\pi \times {10}^{-7}H{m}^{-1}$
• B. $4\pi \times {10}^{-7}H{m}^{-1}$
• C. $8\pi \times {10}^{-7}H{m}^{-1}$
• D. $\pi \times {10}^{-7}H{m}^{-1}$

Answer 1

The correct option is B $4\pi \times {10}^{-7}H{m}^{-1}$

The permeability constant (${\mu }_0$), also known as the magnetic constrant or the permeability of free space, is a measure of the amount of resistance encountered when forming a magnetic field in a classical vacuum. The magnetic constrant has the excalt value $({\mu }_0=4\pi \times {10}^{-7}{HM}^{-1}$).