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The sphere in the first tab and the electroscope are made of metal. In a conductor, the electrons can move, but not positive ions. By placing a charged conductor near the sphere, the charge distribution in the sphere is disturbed.
This disturbance occurs without contact for the electrical forces act at a distance. This phenomenon is called "electrostatic induction" or "electrification by induction."
Drag the charged stick.
- To illustrate the action of electric force at a distance (Coulomb's law).
- To discover the principle of operation of the electroscope.
The electroscope (or electrometer) is a measuring device that detects the presence of electric charges on a body.
It consists of an electrode (the ball on the animation) and two thin ribbons…
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