magnetostatic field การใช้

The magnetostatic field produced by any arrangement of stationary permanent magnets is a conservative field.
According to Earnshaw's Theorem a paramagnetically magnetised body cannot rest in stable equilibrium when placed in any combination of gravitational and magnetostatic fields.
Similarly, if only the magnetic field ( "'B "') is non-zero and is constant in time, the field is said to be a magnetostatic field.
These equations are the time-dependent generalization of Coulomb's law and the Biot Savart law to electrodynamics, which were originally true only for electrostatic and magnetostatic fields, and steady currents.
In the case the fields are time-independent ( electrostatic and magnetostatic fields ), the time derivatives in the \ Box operators of the fields are zero, and Maxwell's equations reduce to