Static electricity (Edexcel GCSE Physics): Flashcards
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15 cards from this deck
Static electricity definition
Static electricity definition
Build-up of electric charge on surface of objects
Cause of static electricity
Cause of static electricity
Friction when materials rubbed together
Particles transferred in static electricity
Particles transferred in static electricity
Negatively charged electrons
Why charge is static (doesn't move)
Why charge is static (doesn't move)
Materials are insulators; electrons can't move
Which particles move in static electricity
Which particles move in static electricity
Negative electrons (always)
How like & opposite charges interact
How like & opposite charges interact
Like charges repel, opposite charges attract
Sparking definition
Sparking definition
Charge jumps through air to balance charges
'Earthed' object definition
'Earthed' object definition
In contact with earth, provides path for electrons
Where electrons always try to go
Where electrons always try to go
To the earth
Charges formed by rubbing materials
Charges formed by rubbing materials
Positive on one (lost ), negative on other (gained )
Static use: spray painting
Static use: spray painting
Paint spreads evenly & sticks to surface
Static use: photocopiers
Static use: photocopiers
Attracts toner to paper in correct pattern
Static danger: fires/explosions
Static danger: fires/explosions
Sparks can ignite flammable gases or liquids
Why warm air rises (lightning)
Why warm air rises (lightning)
Warm air less dense than cold air
How charge forms in clouds (lightning)
How charge forms in clouds (lightning)
Ice crystals rub together as warm air rises