Static Electricity (Grades 11-12)
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occurs when electric charges build up on objects, such as when materials are pulled apart or rubbed together, causing positive (+) charges to collect on one material and negative (−) charges on the other surface.
- static electricity
- dynamic electricity
A Van de Graaff generator can produce a larger static charge than rubbing a ballon on a sweater. First, a high voltage power supply puts electric charge on a moving insulating belt. The belt carries electric charges upwards where a metal contact . This accumulation of voltage can reach up thousands or even millions of volts.
- conducts the charges to the ground
- conducts the charges onto a metal conducting sphere
- conducts the charges back around the loop of insulating belt
- conducts the charges out into the air
What is a name for negatively charged subatomic particles?
Particles that have the same kind of charge will attract each other.
Materials with loosely-bound, outer electrons can lose those electrons easily and become positively charged. One such material is
Materials with weakly bound electrons tend to lose them, while materials with sparsely filled outer shells tend to gain them. What is this effect called?
- electron exchange effect
- triboelectric effect
- photoelectric effect
- piezoelectric effect
A material's place in the triboelectric series is determined by how strongly the material holds on to its electrons.
Silicon is a material ranked very low in the triboelectric series. This means that it has the tendency to electrons.
Materials placed very close to each other in the triboelectric series exchange maximum charge.
The amount of charge that builds up due to the friction between two materials depends on the
- weight of the materials
- surface area in contact
- electrical conductivity of the materials
- lattice structures of the materials