The magnetic constant (μ0), also known as permeability of free space, is an important physical constant representing the ability of vacuum to support magnetic fields. It relates the magnetic field strength to the electric current and is approximately equal to 4π × 10^(-7) T·m/A.
Magnetic Field: A magnetic field is a region around a magnet or moving electric charge where magnetic forces are exerted on other magnets or charges.
Ampere's Law: Ampere's law relates the magnetic field created by an electric current flowing through a closed loop to the magnitude of that current.
Gauss's Law for Magnetism: Gauss's law for magnetism states that there are no isolated magnetic poles (monopoles), and any magnetic field lines must form closed loops.
AP Physics C: E&M - 5.3 Maxwell’s Equations
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