El-1 Charging by Induction
Published: Tuesday 14 March 2006 - Updated: Thursday 31 March 2011
Aim
To charge an electroscope by induction.
Apparatus
- Electroscope
- Charging rod and cats fur
- Portalab
Diagrams
Click on pictures to enlarge.
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Charge By Induction Apparatus |
Charging By Induction Diagram |
Videos
Charge By Induction |
Direct Charge Transfer |
Description
The charging rod is charged negatively by rubbing it with the cats fur (a flicking motion is found to work best). The rod is brought near the cap of the electroscope whose leaves diverge indicating potential. The cap of the electroscope is now earthed by touching it while the charged rod is still near it. Electrons will flow to earth. The earth connection and the charged rod are removed in that order, leaving a nett positive charge on the electroscope.