Charging by friction

Numéro d’image : 13619035
Charging by friction
Charging by friction, 1 of 4. A metal leaf electroscope is used to demonstrate charging by friction. Initially the electroscope is not electrically charged and there are no charged objects nearby. The two aluminium metal leaves hang loosely at the end of the metal shaft. When a hard rubber rod is rubbed against a synthetic fibre cloth, the rod becomes negatively charged through the triboelectric effect. Then the charged rod is brought close to (but not touching) the ball at the top of the shaft, the charges in the electroscope separate (electrostatic induction), causing the leaves to spread apart. When the hard rubber rod then touches the ball, the charges are transferred to the ball and the electroscope becomes charged. Its leaves remain separated even after the rod is removed.
Licence : Droits gérés
Crédit: Science Photo Library / Turtle Rock Scientific
Taille de l’image : 5141 px × 3417 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

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