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  8  High-voltage power supply, 10 kV LD
1 501051  4  Cable for high voltages, 1.5 m LD
1 53214  8  Electrometer amplifier LD
1 562791  4  Plug-in power supply, 12 V AC LD
1 57825  4  Capacitor, 1 nF, STE 2/19 LD
1 57810  4  Capacitor, 10 nF, STE 2/19 LD
1 531120 Multimeter LDanalog 20 LD
1 53216  8  Connecting rod LD
3 30011  4  Saddle base LD
1 34089  4  Coupling plug 4 mm LD
2 30041  4  Stand rod, 25 cm, 12 mm Ø LD
2 30101  4  Leybold multiclamp LD
1 59013  4  Stand rod with bore holes LD
1 500610  4  Safety connecting lead, 25 cm, yellow/green LD
1 50145  4  Connecting lead 19 A, 50 cm, red/blue, pair LD
1 500424  8  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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