Static electricity
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Static Electricity. Jenna Loux Alicia Ferrara . Ouch!. Earlier this week I was walking in my apartment in my fuzzy socks and I went to reach for the door knob when when pizza man knocked and I got a shock…it made me wonder why that happens. Fundamentals of the Atom. Positively Charged

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Static Electricity

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Static electricity

Static Electricity

Jenna Loux

Alicia Ferrara


Static electricity

Ouch!

  • Earlier this week I was walking in my apartment in my fuzzy socks and I went to reach for the door knob when when pizza man knocked and I got a shock…it made me wonder why that happens


Fundamentals of the atom

Fundamentals of the Atom

Positively Charged

Protons

Parts of An Atom

Neutrally charged Neutrons

  • At the center of each atom, is a nucleus, which contains tiny particles called protons and neutrons

  • even smaller particles that orbit the nucleus called electrons.

Negatively

Charged

Electrons

Negatively

Charged

Electrons


Materials

Materials

Conductors

Insulators

Materials that hold on to their electrons very tightly, and this does not allow for them to pass through very well.

Plastic

cloth

Glass

Dry air

  • Materials that have loosely held electrons which allow for them to jump around

  • Most metals are good conductors.

  • Water

  • Copper still very popular


Electrical charges

Electrical Charges

Protons have a (+) positive electric charge

Electrons have a (-)negative electric charge

Neutrons have are neutral and have no charge

A charged atom is called an "ion."

The charge of one proton is equal in strength to the charge of one electron

When the number of protons in an atom are equal to the number of electrons in the atom, the atom become neutral, and gives off no charge.


Electric charge cont

Electric Charge Cont.

  • Positive and negative charges sometime behave in peculiar ways.

  • Objects with opposite charges (a positive and a negative) will pull towards each other and actually attract.

  • Objects with the same charge (two positives or two negatives) will push away, and repel one another.


Charged objects can also attract neutral objects

Charged Objects can also Attract Neutral Objects

  • An example would be to charge a balloon to make it stick to a wall.

  • Rubbing a balloon against your hair

  • When you rub the balloon, it picks up extra electrons that have a negative charge

  • Holding it near a neutral object ( the wall) will make the charges in that object move around.


Static electricity1

Static Electricity

  • If it is a conductor: many electrons will travel to the other side, trying to get as far away from the balloon as possible

  • If it is an insulator: the electrons in the atoms and molecules can only move slightly to one side, away from the balloon

  • But, in both cases, there are more positive charges closer to the (negative) balloon

  • Opposites attract----> the balloon sticks !! ( until the extra electrons slowly drop off)

  • (The same would apply to neutral and positively charged objects)


So why the shock from the d oor k nob

So Why the Shock from the Door Knob?

  • As you walk across carpet you electrons move from the rug to you

  • Leaving you with extra electrons and a negative static charge

  • As you touch the metal door knob ( a conductor) and you get shocked as the electrons jump from you to the knob


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