1. Static Electricity
In Our World

2. Every physical thing in our world
is made up of tiny particles called ATOMS.

3. What is an atom?

4. Electrons spin
like crazy
around the
nucleus.

5. - - - - - Usually, atoms are NEUTRAL. They have the same number of
protons (+) and electrons(-).
They are balanced.
They have no charge, as the protons
cancel out the electrons.
+++++

6. Sometimes, electrons can transfer to different atoms
When they get disturbed.

7. negatively charged atoms… (more electrons than protons)
This creates
negatively charged atoms…
(more electrons than protons)
5 electrons
3 protons

8. …or positively charged atoms (more protons than electrons).

9. Imbalanced atoms create
STATIC ELECTRICITY.

10. Rubbing some things together can create static electricity
Rubbing some things together can create static electricity. Rub a balloon on hair and the hair loses electrons to the balloon which becomes
negatively charged…
…and the hair becomes
imbalanced with
too many protons, which
makes all the hairs
positively charged.

11. Like charges REPEL, so all the positively charged hairs
try to stay away from each other.

12. + + + + + + + + + + + + + + + + + + +

13. - - - - + + + + The negatively charged balloon is looking
for something to balance out its electrons,
so it will be ATTRACTED to protons on a
wall (or a hand, or a pet)! + - + - + - - +

14. But how are the principles of REPEL and ATTRACT
in static electricity used in the real world?

15. COPIERS The drum inside becomes positively charged
to look like the picture being copied.
The toner (ink) is negatively charged and is attracted to the positive charges on the drum.
This makes the copy of the picture.

16. ELECTROSTATIC COATING
The object to be painted is given a negative charge.
The paint is given a positive charge as it comes out
the nozzle, which is strongly attracted to the object.
Electrostatic painting is smooth, even, and strong.

17. AIR PURIFIERS Air is circulated past a corona
wire - an electrical field.
The dust particles become
negatively charged. They then
flow past a metal screen that
is positively charged. The dust
is attracted to the screens, and
the rest of the (clean) air goes
back into the room.

18. SMOKESTACKS & POLLUTION
Smoke particles pass by
a negatively charged screen
in the smokestack,
and become negatively
charged themselves.
They are attracted to
positively charged
plates further up the
smokestacks, removing them from the air.

19. Understanding Science
Helps Us Live
More Comfortably
In Our World!