Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrically charged droplet: Influence of the generator configuration
  and the nature of the liquid   We studied how to charge droplets by induction and how to maximize this
charge. In order to aim this objective, we developed an innovative device that
avoids non-linear effects and that is able to charge liquids of different
nature. The device developed resembles a planar capacitor. The influence of the
nature of the liquid (i.e. presence of ions in solution, polarity, surface
tension and conductivity) on the charge induced was measured. We deduced that
there exists a threshold of electrical conductivity for the fluid below which
it does not charge according to the "perfect conductor" model.

36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci