Show Me The Physics
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plasma_ball.mov |
Most people view electricity
Download Animation (bulbs.zip - 240 KB)
Batteries don't supply the electrons Instead, they create an electric field that 'pushes on'
Alessandro Volta's electric battery prototype (18 century)
Print these Fill in the Blank Notes Electric Current - stream of electrically charged particles passing through a given area (movement of electrons in a wire
A) Conductivity of Solids 1) Metals - contain many free electrons (good conductors)
2) Glass, fused quartz, rubber - good insulator Few free electrons Insulators have a High Resistivity (Structural resistance to electrons flow)
3) Semiconductor - a material with a resistance between conductor and an insulator
B) Conductivity of Liquids
1) pure liquids don’t conduct
2) liquid with dissolved ions conduct
(electrolyte solution)
(ion movement transfers charge
Ions transfer charge in living things
C) Conductivity of Gases Gases conduct when ionized (charged) when exposed to:
a) high energy radiation
b) OR electric field
c) OR with collision with high speed particles
Charge in a gas is transferred by ions and electrons
Plasma–very hot ionized gas
©Tony Mangiacapre.,
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