STATIC ELECTRICITY. What is static electricity? How does it is generated?
Static Electricity
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Transcript of Static Electricity
Static ElectricityStatic ElectricityStatic Electricity
abundance of positive or negative charge in an object
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Loosely held electrons (valence electrons) are able to move between objects and within materials
StaticStatic Electricity Electricity
The movement The movement of electronsof electrons
Where does the Where does the charge come from?charge come from?
Next[S. Ball 2004]
Charging materials by frictionCharging materials by friction
BackHome
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-Acetate
loses negative charge
= Positive
Cloth gains negative charge
= Negative
Acetate rod Cloth
Two materials can become electrically charged when they are rubbed against each other.
Static ElectricityStatic Electricity
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Repel and AttractRepel and Attract---- -
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-- -Two materials which have different charges will attract each other.
Two materials which have the same charge will repel each other.
When a material which is charged comes near something which isn’t charged, it tends to induce a charge. This is because the electrons in the uncharged substance move away from the charged object.
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CHARGING BY INDUCTIONCHARGING BY INDUCTION
ConductorsConductorsConductor
material that allows electrons to move through it easily
e- are loosely held ex: metals like copper and
silver
InsulatorsInsulatorsInsulator
material that doesn’t allow electrons to move through it easily
e- are tightly held ex: plastic, wood, rubber, glass
Static ElectricityStatic ElectricityStatic Discharge the movement of electrons
to relieve a separation in charge
Static ElectricityStatic ElectricityGrounding
Provides a path for electrons to travel to relieve a difference in charge