What is an electronic charge

Electric charge

The electric charge describes the shortage or excess of electrons. The electrical charge can easily arise through friction (electrification). Either electrons are taken away or electrons are accumulated. The result is a lack of electrons (positive charge) or an excess of electrons (negative charge).
Unequal charges strive to equalize. The electric current results from this attempt to balance.

  • The same charges repel each other!
  • Unequal charges attract each other!

Unequal charges

Striving for balance


Excess electrons tend to transfer to the charge with the lower number of electrons.

Same charges

Electroscope


The electroscope is used to detect the electrical charge.
The electroscope is a grounded housing in which there is a vertical metal rod to which a movable pointer is attached. This is a little heavier at the bottom so that it stays upright.
If the upper plate is brought into contact with a negative pole, the flowing electrons are distributed over the rod and pointer.
Since poles of the same type repel each other, the pointer deflects. The stronger the charge, the stronger the pointer deflection.

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