Electrostatics. Section 1: The Atom and Charging Subatomic Particle Charges e: p: n:

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Presentation transcript:

Electrostatics

Section 1: The Atom and Charging Subatomic Particle Charges e: p: n:

Conductors: Demos: Find materials in the room that are conductors Line up washer and charge with high voltage Charge distilled water, city water and Gadorate Pass charge through bike tire Insulators: Demos: Place a charge on a balloon and notice charge location. Have students charge a letter and then do the same. Ask how a copier works. Use VDG to see of charge Is confined to areas

Ways to Charge an object 1) Charge by Contact or (friction):___________________________________

Triboelectric Series: A List that ranks materials according to how well they charge either (+) or (-). (refer to hand out) + POSITIVE END OF SERIES (materials with lower work function) asbestos glass nylon wool lead silk aluminum paper cotton steel hard rubber nickel & copper brass & silver synthetic rubber orlon saran polyethylene teflon silicone rubber - NEGATIVE END OF SERIES (materials with higher work function)

Charge by Polarization: Force between Charges: Demo: Have students hold balloons with charge to eachother. Electrons and Electrons:_________ Protons and Protons:____________ Electrons and Protons:___________

Charge By Induction

How a VDG Works

Extension Activities: Pie Pan Activity: 1) Describe How to make the aluminum ball bounce back and forth when you touch the ball. 2) Describe why the aluminum ball bounces back and forth when you touch it.

Extension Activities Continue Van de Graaf Generator LabText Reflection Problems