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Electroscope HTML5


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.

Learning goals

  • To illustrate the action of electric force at a distance (Coulomb's law). 
  • To discover the principle of operation of the electroscope.

Learn more

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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