Electrical charges and fields

  • Created by: LShahid3
  • Created on: 16-09-18 12:41

Electrical charges and fields

Some insulating materials become charged when rubbed together. An ion is a charged atom.

Adding electrons to uncharged atoms makes it negative (because it has gained an electron) and removing an electron makes it positive (because it has lost an electron).

Charging by friction:

Some insulators become charged when you rub them with another insulator such as dry cloth. When you rub the insulator, electrons are transferred from one of the materials to the other material.

-Rubbing a polythene rod with a dry cloth transferes electrons to the surface atoms of the rod from the cloth. So the polythene rod becomes -vely charged.

-Rubbing a perspex rod with a dry cloth transfers electrons from the surface


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