A relation underlying the electromagnetic analogy method is derived from the Biot–Savart and Coulomb laws: the magnetic field B generated by a current I in a conducting loop L and the electric field E of a thin double charged layer of area S bounded by the same loop L are linked by the formula B = (ε
0
μ
0
I/p
1e) E, where p
1e is the electric moment per unit area S, and ε
0 and μ
0 are the permittivity and permeability of free space. Examples are given where this electromagnetic analogy can be used for solving electro- and magnetostatics problems.
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