Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric dipole in a magnetic field: some aspects of the problem   In the paper some regimes of motion of an electric dipole placed in a uniform
magnetic field are considered. The motion of both three-dimensional and
two-dimensional dipole in the plane perpendicular to the magnetic field is
studied. In the case of a two-dimensional dipole is discussed, in particular,
the regime of chaotic dipole motion, which arises when, along with the magnetic
field, there is an electric field rotating in the plane of motion. The motion
of a three-dimensional dipole is discussed in cases that allow for analytical
consideration. Finally, the same examples are used to discuss the
quantum-mechanical approach to the problem.

18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th