Field Patterns Flashcards
Explain how to charge a metal object Describe what the direction of an electric field shows concerning a test charge Illustrate the strength of an electric field by using field lines
Define electrical conductors
Materials that can conduct electricity
What are free electrons?
Electrons in a conductor that move about freely inside the metal because they are not attached to a particular atom
Explain how to charge a metal object
- Isolate metal from earth
Why: otherwise any charge given to it is neutralised by electrons transferring between metal and earth - Charge by direct contact with any charged object
Define electrical insulators
Materials that do not contain free electrons
Why are some insulators easy to charge?
Their surface atoms easily gain or lose electrons
State two equations for current (I)
I = Q/T
I = Qf
Any two charged objects exert…
Equal and opposite forces on each other without being directly in contact
What is an electric field?
A force field created around an object due to its charge in which any other object experiences a force
In the context of electric fields what is a field line
The path a free positive test charge follows
What does the direction of a field line show?
The direction a positive test charge follows
Illustrate the field lines around oppositely charges points
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Illustrate the field lines around a point near a plate
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Illustrate the field lines around oppositely charged plates
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Illustrate the field lines around like charged points
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