what is the si unit of magnetic field
Magnetic field The magnetization vector field M represents how strongly a region of material is magnetized. It is defined as the net magnetic dipole moment per unit volume of that region. The magnetization of a uniform magnet is therefore a material constant, equal to the magnetic moment m of the magnet divided by its volume. Since the SI unit of magnetic moment is Aâ‹…m2, the SI unit of magnetization M is ampere per meter, identical to that of the H-field.
Coulomb The SI system defines the coulomb in terms of the ampere and second: 1 C = 1 A × 1 s.[3] The second is defined in terms of a frequency naturally emitted by caesium atoms.[4] The ampere is defined using Ampère's force law;[5] the definition relies in part on the mass of the international prototype kilogram, a metal cylinder housed in France.[6] In practice, the watt balance is used to measure amperes with the highest possible accuracy.[6]