Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electromagnetic Fields of Charged and Magnetized Cylindrical Conductors
  in NUT Space   We present analytic solutions of Maxwell equations for infinitely long
cylindrical conductors with nonvanishing electric charge and currents in the
external background spacetime of a line gravitomagnetic monopole. It has been
shown that vertical magnetic field arising around cylindrical conducting shell
carrying azimuthal current will be modified by the gravitational field of NUT
source. We obtain that the purely general relativistic magnetic field which has
no any Newtonian analog will be produced around charged gravitomagnetic
monopole.

3
The categories of this paper are: physics
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: math