The document discusses static electricity and electrical charge. It explains that static electricity is a build up of electrons on a surface that are not moving. Electrical charge can cause attraction or repulsion depending on whether charges are opposite or like. Electrical discharge occurs when a build up of electrons moves between objects. A larger separation of charges results in a larger electrical discharge, such as from lightning versus a small carpet shock. A Van de Graaff generator is used to demonstrate building up a static charge by rubbing a belt on a wire brush.

1. Static Electricity

2. Balloon Demo
 Rub your balloon on your shirt
 What happens when you hold it over confetti?
 Why did this happen?
 What happens if you put 2 balloons next to each other facing
the same way? What about facing the opposite way?
 Why did this happen?
 Try sticking it to the wall and sticking it to metal

4. Static Electricity
 Static: Not moving
 Electricity: Electrons that are moving or
could move
 Static Electricity: is a build up of electrons
on an area or surface that are not moving
or flowing.

5. Electrical Charge
 As we have learnt, elements are
made of protons neutrons and
electrons.
 Protons are positive
 Electrons are negative.
 Objects may become charged or are
neutral having no charge
 Like charges repel each other
 Opposites attract

6. Electrical Discharge
 An electrical charge can build up.
 As the charge gets larger the electrons
repel each other more and more and at the
same time are more and more attracted to
protons.
 Electrical Discharge: The build up of
electrons moving from one object to an
other

7. Electrical Discharge
 The larger the charge separation (dividing of
protons and electrons) the larger the electrical
discharge. You would be hurt more from lightning (a
large separation of charge) then from a carpet
shock (rubbing you feet on the carpet then touching
metal).

8. Van de Graaff Generator
 It builds up a charge of
electrons on the outside
of the sphere. A belt
rubs up on a wire brush.
The electrons repel each
other And you could
shock someone by
touching the VDG
releasing the charge.