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Physics

Static Electricity (Section 2)

QuestionAnswer
Describe what a spark is The jumping of electrons across the gap between an object with high voltage and an earthed object with 0V
What is static electricity? The build up of charge on insulating materials
Why doesn't friction between two conducting materials cause a build up of charge? Electrons can just flow straight back to where they came from
A build up of electricity usually occurs on what kind of material? Insulating materials
What kind of particles are transferred when two materials are rubbed together? Electrons
What causes the metal body of a car to build up a charge? Contact with the wind
Like charges _________, opposite charges ____________ repel, attract
Give two examples of materials that are electrical insulators Plastic, rubber
A static charge is a charge that builds up in one place and is ___________ to move not free
How can a charged conductor be discharged safely? Connecting it to earth with a metal strap
As electric charge builds up on an object, what also builds up? Voltage
What is an example of a huge spark? Lightning
When rubbing a polythene rod with a duster, electrons move from _____ to ______ duster to rod
When rubbing an acetate rod with a cloth duster, electrons move from ______ to ______ rod to duster
Describe how Van de Graaf generators build up a charge on the metal dome A rubber belt moves plastic rollers underneath a metal dome, building up an electrostatic charge
Why do Van de Graaf generators make hair stand on end? The human body conducts charge, meaning the charge the generators conducts to your body will spread out as far away from each other as possible, as like charges repel
What common non-metal conducts electricity? Carbon
Explain the advantages of using an electrostatic insecticide spray compared to an uncharged insecticide spray - Droplets will repel each other, producing a fine/even spray - Droplets attracted to plant, improving coverage of leaf in more obscure areas
When a charged balloon sticks to a neutral wall, we say the wall has been charged by what? By induction
Created by: JoeMather
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