CHIR114 Lecture Notes - Lecture 4: Field Line, Electric Potential Energy, Electroscope
22 Aug 2018
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16th of august 2018: physics lecture electrostatics and electric current: electricity: For example: getting nylon clothes out of the drier. It is a buildup of electrical charge on an object: conductors and insulators: Conductors are materials through which charges move freely. Insulators do not move freely: electrostatics: Unlike charges attract: positive and negative experiment: Plastic rod rubbed with wool and placed near an electroscope: Rub black plastic rod against some wool and put it close to the electroscope. The charges are alike resulting in the materials repelling each other. Glass rod rubbed with silk cloth and placed near an electroscope: Rub the glass rod with silk cloth and positive charges appear on the rod. At the same time, negative charge appears on the silk cloth resulting in the net rod- cloth charge = 0. This suggests that rubbing the glass rod against the silk cloth doesn"t formulate charge; it just transfers the charge between the materials.
