1. CH 5 – Electricity and Magnetism
Static Electricity
CH 5 – Electricity and Magnetism

2. Van de Graaff Generator

4. PhET Sim
static-electricity
Bill

5. Triboelectric Effect Greeks + Other Mediteranean
Amber + Fur = Attracts Feathers
 New Latin word electricus ("of amber" or "like amber", from ἤλεκτρον, elektron, the Greek word for "amber") t

6. Static Electricity
Def: Related to electrical charges at rest, within or on the surface of a material. These can be the result of a temporary movement of electrons from one substance to another
Generally, substances are found in a neutral state (same # of + and -). When electrons move from one substance to another the materials become charged.
We will discuss dynamic electricity later in the term
static-electricity

7. Charging Objects
Balloon

8. Rules There is a positive (+) and a negative (-) charge
Only electrons (e-) can move
If a substance has more protons, it is positively charged. If it has more electrons, it is negatively charged.
To become neutral again, a substance will lose or gain electrons

9. Rules Alike charges repel, opposites attract
Friction (rubbing) causes the electrons to be passed on
Touching passes on the charge
A charged substance can attract a neutral substance because the protons will align with the electrons

12. P. 148 table 5.18 is a good summary of the methods of charging

14. Electrostatic Series Triboelectric series
Gives a hierarchy of substances and their ability to lose and gain electrons.
An object above another object will gain electrons from the ones below it.
Must memorize: (eh not really. Sorta) plastic will always gain electrons and be negatively charged. Glass will always lose electrons and become positively charged.

15. Example Plastic Gold Wood Cotton Paper Glass
Rub: plastic and wood rub: gold and paper
1- What happens if plastic and paper come close?
2- Gold and plastic?
3- Wood and paper?