An electric field is created around an electrically charged object
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what happens to the field as you go closer to the object?
the field gets stronger the closer you go to the object
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If the lines are closer on an electric field what does this show?
it shows that the field is stronger
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which way do the arrows point on a positive electric particle?
they point away from the particle- they point towards if its negative
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what happens to the object if it is placed in an electric field of another object?
the object feels a force - either attraction (if they are opposite) or repulsion (if they are the same)
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what is the diagram for two oppositely charged particles?
-
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how are sparks caused - basic definition
sparks are caused when there is a high enough potential difference between a charged object and the earth.
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what does a high potential difference give to the object?
A high potential difference gives the object a strong electric field
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what does a strong electric field do to electrons in the air particles?
strong electric field causes electrons in the air particles to be removed - called IONISATION
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how does ionisation lead to causing a spark?
air is normally a insulator but when it is ionised it is much more conductive so a current can flow through it. This is the spark
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what does a Van De Graaff generator generate? how does it generate this?
A Van De Graaff generator generates static electricity. It does this by a motor turning a rubber band and friction between the band and the rollers starts to build up huge amounts of charge. This charge is then deposited on the metal dome, a conducto
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how many volts could a van de graaff generator generate?
The charge can build up in a big way, causing voltages as high as 50,000 Volts.
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what are some useful uses for static?
photocopiers, printers, removing pollution, sparks can also cause lightning - which isn't very useful
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Other cards in this set
Card 2
Front
what happens to the field as you go closer to the object?
Back
the field gets stronger the closer you go to the object
Card 3
Front
If the lines are closer on an electric field what does this show?
Back
Card 4
Front
which way do the arrows point on a positive electric particle?
Back
Card 5
Front
what happens to the object if it is placed in an electric field of another object?
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