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Electrostatic induction with the hemispheres after Cavendish

VP3.1.5.2
Electrostatic induction with the hemispheres after Cavendish
Electrostatic induction with the hemispheres after Cavendish

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Description

The experiment P3.1.5.2 reconstructs a historic experiment first performed by Cavendish. A metal sphere is mounted on an insulated base. Two hollow hemispheres surround the sphere completely, but without touching it. When one of the hemispheres is charged, the charge distributes itself uniformly over both hemispheres, while the inside sphere remains uncharged. If the inside sphere is charged and then surrounded and contacted by the hemispheres, the two hemispheres again show equal charges, and the inside sphere is uncharged.

Components of equipment sets

1 543021  4  Sphere on insulated stand rod LD
1 54305  8  Cavendish hemispheres, pair LD
1 52170 High-voltage power supply, 10 kV LD
1 501051 Cable for high voltages, 1.5 m LD
1 53214 Electrometer amplifier LD
1 562791 Power supply unit (mains adaptor), 12 V AC LD
1 57825 Capacitor, 1 nF, bipol., STE 2/19 LD
1 57810  4  Capacitor, 10 nF, bipol., STE 2/19 LD
1 531120 Multimeter LDanalog 20 LD
1 53216 Connecting rod LD
3 30011 Saddle base LD
1 34089 Coupling plug 4 mm LD
2 30041 Stand rod, 25 cm, 12 mm Ø LD
2 30101 Leybold multiclamp LD
1 59013 Stand rod with bore holes LD
1 500610 Safety connecting lead, 25 cm, yellow/green LD
1 500421 Connecting lead 19 A, 50 cm, red LD
1 500422 Connecting lead 19 A, 50 cm, blue LD
1 500424 Connecting lead 19 A, 50 cm, black LD
1 50142  4  Connecting lead 32 A, 100 cm, yellow/green LD

Experiment Instructions

PDF (Experiment description) PDF (Experiment description) P3.1.5.2 Electrostatic induction with the hemispheres after Cavendish
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