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Determining the capacitance of a sphere in front of a metal plate

Determining the capacitance of a sphere in front of a metal plate

VP3.1.6.2

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Description

The experiment P3.1.6.2 shows that the capacitance of a body also depends on its environment, e.g. the distance to other earthed conductors. In this experiment, spheres with the radii r are arranged at a distance s from an earthed metal plate and charged using a high voltage U. The capacitance of the arrangement is now

The aim of the evaluation is to confirm the proportionality between the charge Q and the potential difference U at any given distance s between the sphere and the metal plate.

Components of equipment sets

1	543001	Set of 3 conducting spheres
1	58766 4	Reflection plate
1	52170 8	High-voltage power supply, 10 kV
1	501051 4	Cable for high voltages, 1.5 m
1	53214 8	Electrometer amplifier
1	562791 4	Power supply unit (mains adaptor), 12 V AC
1	57825 4	Capacitor, 1 nF, bipol., STE 2/19
1	57810 4	Capacitor, 10 nF, bipol., STE 2/19
1	531120	Multimeter LDanalog 20
1	54612 4	Faraday's cup
1	590011 8	Clamping plug
1	53216 8	Connecting rod
1	59013 4	Stand rod with bore holes
3	30011 4	Saddle base
1	501861 8	Crocodile-clips, polished, set of 6
1	31178 4	Tape measure 2 m / 1 mm
1	30042 4	Stand rod, 47 cm, 12 mm diam.
1	500610 4	Safety connecting lead, 25 cm, yellow/green
1	500421 4	Connecting lead 19 A, 50 cm, red
1	500422 4	Connecting lead 19 A, 50 cm, blue
1	500424 8	Connecting lead 19 A, 50 cm, black
1	50133 4	Connecting lead, 32 A, 100 cm, black
1	50143 4	Connecting lead 32 A, 200 cm, yellow/green

Experiment Instructions

PDF (Experiment description)

P3.1.6.2 Determining the capacitance of a sphere in front of a metal plate

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Determining the capacitance of a sphere in front of a metal plate

Description

Components of equipment sets

Experiment Instructions

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