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Static Electricity

Static Electricity. SNC1D0. What is electricity?. Electricity is the energy generated from the transfer of electrons Electrons are located on the outside of atoms, and can easily move in or out of atoms. Types of Electricity. There are 2 main forms of electricity:

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Static Electricity

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  1. Static Electricity SNC1D0

  2. What is electricity? • Electricity is the energy generated from the transfer of electrons • Electrons are located on the outside of atoms, and can easily move in or out of atoms

  3. Types of Electricity • There are 2 main forms of electricity: • Static electricity refers to when electrons are built up on an object • Current electricity refers to a flow of electrons

  4. Static Electricity • Static electricity can be generated through: • Friction • Contact/ Conduction • Induction

  5. Charging by Friction • Also know as “charging by rubbing” • When 2 differentNEUTRAL objects rub against each other, they become charged • Example: FRICTION Hair is positively charged Neutral Neutral

  6. Charging by Friction • Example: • Rubbing feet on carpet! • Clothes in a dryer!

  7. Electrostatics • Electrostatics refers to the ability for something to hold onto electrons, the study of static electricity • Something with a greater hold on electrons can “steal” electrons from something with a weaker hold (Weak hold of electrons) Acetate Glass Wool Cat fur, human hair Calcium, magnesium, lead Silk Aluminum, zinc Cotton Parafin wax Ebonite Plastic Carbon, copper, nickel Rubber Sulphur Platinum, gold (strong hold on electrons)

  8. Electrostatics • Example: • If you rub a glass rod with a piece of silk, the electrons from the silk jump onto the glass • The glass becomes negatively charged • The silk becomes positively charged (Weak hold of electrons) Acetate Glass Wool Cat fur, human hair Calcium, magnesium, lead Silk Aluminum, zinc Cotton Parafin wax Ebonite Plastic Carbon, copper, nickel Rubber Sulphur Platinum, gold (strong hold on electrons)

  9. What would happen if you rubbed a rubber balloon against a wool sweater? Use Electrostatic series! • Rubber has a higher attraction for its electrons than wool so it would gain e- and become negative • Wool would lose e- and become positive • Positive and negative = attraction

  10. Charging by Contact/ Conduction • When a charged object touches a neutral object, it becomes charged as well • Example: When you touch a charged sphere, the electrons jump into your body and charge your hair

  11. Charging by Contact/Conduction • Example: • Touching a door knob (pic on pg. 279) After rubbing against the balloon, comb becomes positively charged When the positively charged comb touchesneutral hair, hair becomes positively charged.

  12. Charging by Contact/ Conduction An electroscope is a device that can detect small amounts of charge in another object. Explanation • When neutral pithball is touched with positive rod, e- leave pithball due to attraction, leaving it with a positivecharge  +  +  + +  + + + neutral positive 2. When neutral pithball is touched with a negative rod, e- leave rod and are transferred to pithball to leave it with a negative charge  +  +      + +  + neutral negative

  13. Method of Creating Static Charges

  14. Current Electricity • Currentelectricity refers to a flow of electrons • A continuous source of electrons flow from one place to another

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