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Current Electricity

Current Electricity. Current Electricity : is the flow of an ectric charge through a wire. What is the difference between static electricity and current electricity ?.

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Current Electricity

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  1. CurrentElectricity

  2. CurrentElectricity:istheflow of anectricchargethrough a wire.

  3. What is the difference between staticelectricity and currentelectricity? Static electricity is stationary or collects on the surface of an object, whereas current electricity is flowing very rapidly through a conductor. The flow of electricity in current electricity has electrical pressure or voltage. Electric charges flow from an area of high voltage to an area of low voltage. Water pressure and voltage behave in similar ways.

  4. CurrentElectricity (chargeflows)… • Energychargesmoveeasilythroughconductors. • Do yourememberwhat a good conductor is? • …Metals are thebestconductors (remember free electrons?) • Now, whatis a badconductor? • Plastic and rubber are greatinsulators…

  5. HOW DOES A LIGHT BULB WORK? • When a light switchis off, a gap of insulating air keepschargefromflowingbetweentwocopperwires. • Ifyoufliptheswitchyou’llclosethe gap and bringthetwowirestogether. • Whenthewirestouch, theelectricchargeflows.

  6. HOW DOES A LIGHT BULB WORK? • Theflow of charge can nowmovefromthewall socket throughthewiresleadingtothelamp. • Thischargeflowsthroughwiresfromyour local energyplanttoyour home, throughthewires in thewalls, and finallytothe socket.

  7. HOW DOES A LIGHT BULB WORK? • Thechargeflowsthroughtheplugalongthewiresintothelamp and thenthrough a filamentinsidethebulb. • Thefilamentis a conductor. • As a chargepassesthroughit, thefilamentglows and emits light and heat. • Theflow of chargethencontinues in a circle.

  8. What is electrical resistance? Resistance (R)is the opposition to the flow of an electric current, causing the electrical energy to be converted to thermal energy or light. The metal which makes up a light bulb filament or stovetop eye has a high electrical resistance. This causes light and heat to be given off.

  9. THE END…

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