Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Magnetostatics and the electric impact model   The action of certain static magnetic fields on charged test particles is
interpreted as a consequence of the interaction of the particles with electric
dipole distributions emitted by other charged particles in relative motion. The
dipole model of electric forces was initially conceived to emulate Coulomb's
law, but is applied here to a wide class of phenomena, such as forces between
parallel conductors, a relativistic correction of Biot--Savart's law, and the
magnetic moment of a current loop.

10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat