Transcript
Same charges repel, different charges attract
Two types of charge
+
-
+- -
+
Same charges repel, different charges attract
How rubbing can produce static electricity
At the start each material has no overall charge.
Friction rubs electrons offthe cloth onto the surface atoms of polythene.
The polythenegains electronsand becomesnegativelycharged.
However,acetatebecomes positively charged