Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High Voltage Electrostatic Pendulum   A pendulum powered by high voltage electricity is described. The pendulum
consists of two conducting plates(thin foil) separated by copper rods and are
insulated from each other. High voltage is applied to these plates through the
connecting copper rods. Another stationary aluminum plate(thin foil) is placed
in front of the pendulum such that it serves to attract the pendulum plates and
makes electrical contact with them enabling charge transfer between the
stationary plate and the pendulum plates. The pendulum is powered by the energy
stored in the capacitance between the stationary aluminum plate and the
pendulum plate. Attempt has been made to obtain the time period of oscillations
as a function of applied voltage and other parameters. The derived formula for
the time period has been verified experimentally. This apparatus can be used to
demonstrate electrical phenomena in general and in particular electrical energy
stored in conductors of small dimensions.

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The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio