STATIC ELECTRICITY. WHAT IS STATIC ELECTRICITY?  Static electricity is a FIELD FORCE – it can act over a distance.  It is generated by FRICTION.  The.

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Electric Charge & Static Electricity

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Presentation transcript:

STATIC ELECTRICITY

WHAT IS STATIC ELECTRICITY?  Static electricity is a FIELD FORCE – it can act over a distance.  It is generated by FRICTION.  The Van der Graff generator is an apparatus used to generate static electricity.  =rNEY3Yv9kC8&feature=player_de tailpage =rNEY3Yv9kC8&feature=player_de tailpage

MORE ABOUT STATIC ELECTRICITY...  Static electricity is electrical charge that does not move – static.  Objects are charged through friction.  Electrons are lost or gained by objects to become positively or negatively charged respectively.

CHARGES ON OBJECTS  When an object is rubbed it can either lose or gain electrons:  E.g. PVC rubbed with flannel will be negatively charged when rubbed with flannel; the PVC gained electrons from the flannel.  Perspex rubbed with silk or wool will lose electrons to the cloth to become positively charged.  Like charges repel each other; opposite charges attract.  126FBA8519EF&feature=player_detailpage& v=F6v8wm7_vdQ 126FBA8519EF&feature=player_detailpage& v=F6v8wm7_vdQ

LIGHTNING  Sparks given off by charged objects is because charge can jump from one object to another, especially if the air is dry (remember the Van der Graff?)  Lightning is one big spark!  Sparks are produced when discharges take place.  eature=player_detailpage&v=W9x zU0xjlhE eature=player_detailpage&v=W9x zU0xjlhE

Lightning during New Year’s Celebrations in Sydney Harbour, Australia

Everyday examples of static electricity Charged comb picks up tiny pieces of paper

Sometimes electrostatic charge can build up on a cat’s fur, giving off sparks when stroked

Friction makes electrostatic charge build up when the girl slides down the tube.