The Electrostatic Series

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Presentation transcript:

The Electrostatic Series

The electrostatic series was created to show how strong or weak a substance has on electrons The higher up on the series an object is, the weaker its hold on electrons, and the lower down on the series an object is, the stronger its hold on electrons By looking at the electrostatic series, we can predict what charge each object will obtain if they are rubbed together

Example: Combing your hair with a plastic comb positive Human skin Rabbit fur Acetate Glass Human hair Nylon Wool Cat fur Silk Paper Cotton Wood Plastic Rubber balloon Vinyl Polyester Ebonite Example: Combing your hair with a plastic comb Hair is higher on the electrostatic series than plastic. Therefore, it will give up some of its electrons to the comb, becoming positively charged. The comb will thus become negatively charged. negative

Electroscope A device that is used to detect and identify a static charge. We will use the metal leaf electroscope, it has two strips of metal that bend easily and the leaves are attached to a central metal rod with a metal sphere at the top. Charges moves freely within the metal (conductor). Electroscopes can be charged by contact or by induction When an electroscope is charged by contact, the object will end up with the same charge as the charging object

Discharging When electrons are added or removed from a charged object to restore a neutral charge Also known as neutralizing If a charged object is connected to the earth, the object will be discharged, or grounded Grounding is essential for the safety of people who operate electrical equipment. Charges can flow from the ground up or from the object to the ground during grounding.