static electricity
DESCRIPTION
Static Electricity. Review: What is inside the atom?. The atom is made of 3 kinds of particles. The electron The proton The neutron. The Atom. -. -. +. o. o. -. +. +. +. o. o. o. +. +. +. -. -. -. -. Charges. +. +. -. -. Charges. +. -. - PowerPoint PPT PresentationTRANSCRIPT
Static Electricity
Review:What is inside the atom?
The atom is made of 3 kinds of particles.The atom is made of 3 kinds of particles.
The electronThe electron
The protonThe proton
The neutronThe neutron
The Atom
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Insulators and Conductors
Insulators don’t Insulators don’t let electrons flow let electrons flow through themthrough them
Conductors let Conductors let electrons flow electrons flow through themthrough them
Electrons stay stuck on the surface and don’t move—That’s STATIC ELECTRICITY!
Charged Objects
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Neutral Object
Negatively Charged Object
Positively Charged Object
How Do They Become Charged?
ContactContact
Electrons getElectrons get
passed from onepassed from one
object to the otherobject to the other
when they touchwhen they touch
InductionInduction
Electrons in theElectrons in the
object move awayobject move away
or towards anotheror towards another
charged object ischarged object is
placed close to itplaced close to it
Friction
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What happens when you rub a balloon on your head and put it against the wall?
http://phet.colorado.edu/sims/balloons/balloons_en.jnlp
Uses of Static Electricity
Spraying a Car Positive Car
Negative Spraygun
The paint spreads out as each negative drop repels
No paint is wasted as the positive car attracts the negative paint
Removing Smoke from Power Station Chimnies
Positive Plate
Negative Plate
Charge up the Smoke
No smoke leaves the chimney
Grounding Gas Tankers
Petrol rubbing against the pipe can build up a static charge which could cause an explosionThe tanker is joined to the ground with a wire to stop a charge building up
Lightning
What causes lightning?
Lightning is actually Lightning is actually just static electricity just static electricity on a much larger on a much larger scale.scale.
The rubbing is The rubbing is caused by air caused by air moving aroundmoving around
In thunderclouds In thunderclouds bottom is usually bottom is usually negative and top is negative and top is positive.positive.
