Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement of the Relativistic Potential Difference Across a Rotating
  Dielectric Cylinder   According to the Special Theory of Relativity, a rotating magnetic dielectric
cylinder in an axial magnetic field should exhibit a contribution to the radial
electric potential that is associated with the motion of the material's
magnetic dipoles. In 1913 Wilson and Wilson reported a measurement of the
potential difference across a magnetic dielectric constructed from wax and
steel balls. Their measurement has long been regarded as a verification of this
prediction. In 1995 Pelligrini and Swift questioned the theoretical basis of
experiment. In particular, they pointed out that it is not obvious that a
rotating medium may be treated as if each point in the medium is locally
inertial. They calculated the effect in the rotating frame and predicted a
potential different from both Wilson's theory and experiment. Subsequent
analysis of the experiment suggests that Wilson's experiment does not
distinguish between the two predictions due to the fact that their composite
steel-wax cylinder is conductive in the regions of magnetization. We report
measurements of the radial voltage difference across various rotating
dielectric cylinders, including a homogeneous magnetic material (YIG), to
unambiguously test the competing calculations. Our results are compatible with
the traditional treatment of the effect using a co-moving locally inertial
reference frame, and are incompatible with the predictions based on the model
of Pelligrini and Swift.

4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics