1. 1.21 gigawatts of
electrical
power

3. 10 5-stars and 2 4-star reviews at Amazon.
"This is the bleakest, most gothic prog rock I have ever heard."
10 5-stars and 2 4-star reviews at Amazon.
Only $9.43 for the MP3 Album!!!!

4. I. Static Electricity: the study of electrical
_______________ that have _______________ .
charges
come to rest
Atoms are made up of:
electron e- - ________________________ charged
proton p - __________________________ charged
neutron n - ______________________
negatively
positively
uncharged q
The symbol for electric charge = _________
UNITS for q:
1 elementary charge e = equal in magnitude to the
charge on the _______________ or the __________________
 Notice that the symbol e- is different from e.
electron
proton
The charge on 5 electrons is written: q = ___________
The charge on 3 protons is written: q = ___________
The charge on 2 neutrons is written: q = ___________
-5e
+3e

6. No single, isolated charge has ever been found that
is smaller than 1 ____ . You cannot have a charge of
_________ or __________ on an isolated particle or object,
but you can have any integer multiple of it. e
(1/2)e
-13.7e
In practical use, a bigger unit is used for charge:
1 coulomb C = __________________ elementary charges
So you could write 4 coulombs as:
q = 4C = _________________ e = __________________ e
It is possible to have a fraction of 1 C. For example,
0.5 C = _____________________ e
= ________________________________ e ,
because it is still an integer # of elementary charges.
6.25 x 1018
2.5 x 1019
25 x 1018
3.125 x 1018
3,125,000,000,000,000,000

7. What's in your wallet?
6.25 TIMES 10 TO THE 18TH
NEVER
ELECTRON I.N. ATOM

8. charged
neutral
Objects become _________________ when _____________
objects _______________________________ .
gain or lose electrons
has lost electrons
positive ion/object - _______________________________
negative ion/object - ______________________________
has gained electrons A B C 9
# of + q: _____
# of - q: _____
net q = _____ 5
# of + q: _____
# of - q: _____
net q = _____
# of + q: _____
# of - q: _____
net q = _____ 6 2 5 7 +7 -1
Here, q = +7 means ______ and q = -1 means ______
+7e
-1e
B has ________________ and so is ______________ charged
C has ________________ and so is ______________ charged
lost 7 e-
positively
gained 1 e-
negatively

9. He knows if you've been good or knob, …..

10. Two basic types of materials:
__________________ - its electrons can move easily
- best examples are _______________
2. ___________________ - its electrons cannot move easily
There are three basic ways to _______________ charge:
__________________ - by rubbing two __________________
_________________ - by touching two __________________
_________________ - by bringing a ______________ object
near a conductor
conductors
metals
insulators

11. Insulators:
Plastic
Lots of
Plastic

12. Conductors:

13. Conductors:
metal

14. Two basic types of materials:
__________________ - its electrons can move easily
- best examples are _______________
2. ___________________ - its electrons cannot move easily
There are three basic ways to _______________ charge:
__________________ - by rubbing two __________________
_________________ - by touching two __________________
_________________ - by bringing a ______________ object
near a conductor
conductors
metals
insulators
transfer
friction
insulators
contact
conductors
induction
charged

15. Charging by friction (rubbing two insulators together)
requires ________ because the charges are not __________
__________ .
work
free
to move
neutral
________
plastic
straw
__________
wool
neutral
rub together,
then separate.
charged
________
plastic
straw
charged
__________
wool
The charges are ______________ on each object. Also, they
are not ______________________ in either object even though
the like charges __________ each other. This is because
charges cannot move freely in ___________________.
opposite
evenly spread out
repel
insulators

16. Ever get that shock
when getting out
of your favorite car seat?
Now use…

18. Charging by contact (by touching two conductors): the
electrons are __________________ . They arrange themselves
_____________________________________________________
because of _______________________________ .
free to move
as far as possible away from each other
electrostatic repulsion
metal
________sphere
plastic
_________ base
__________
neutral
_________
charged
neg.
_________
charged
pos.
 The charges are _____________________ over the sphere.
spread out
Ex. Touch a negative sphere to a neutral one:
Before:

19. Touch:
The charges _______
each other and
some of them ______
____________________ .
repel
move
to the other sphere
Separate:
evenly distributed
The charges are _______________________ because
they are ____________________ .
The neutral object has become charged with the
____________ type of charge as the charged object.
free to move
same

20. Static Electricity is used in pollution control:
The same idea is used in some air fresheners.

21. You say you love your
computer, but are you
ready to make a….
commitment?

22. Charging by induction: Bringing a ___________object
near a neutral conductor ____________ a charge separation.
charged
induces
Before:
_______
object
neutral
neutral
still _______
but charges
are _________
Bring charged object near
________________________ :
but not touching
separated
Now allow some of the
______________ charges
to escape.
separated
wire
"ground"
Now separate spheres:
Sphere now has
______________
charge!
opposite

23. cloud with separated
charges
negative charges are
driven deep underground
neutral ground
ground is still neutral

24. Ben Franklin’s lightning rod….used.
Lightning rods allow charges
to drain off before they build
up enough to cause a strike.
rod
wire

25. A photoconductor, which holds a
charge in darkness, is applied to
a metal cylinder.
Light from white parts of an image
discharges that part of the cylinder.
Toner is applied, and is attracted
to the charged areas on the cylinder,
where it sticks.
Paper is rolled across the cylinder,
and the toner melts onto it.

27. Charge up the paint drops negatively.
Charge up the part you want to paint positive.
Then you can paint the car with:
…less mess
…less waste
…less skill
…more even layers of paint

28. Whenever charges are __________________ , the total
amount of charge involved always ____________________ .
This is called the Law of ___________________ of Charge.
_________ q before = ________ q after
transferred
remains the same
Conservation
total
total
Ex 1: Two identical metals spheres are touched together.
What is the charge on each after they are separated?
(Assume any excess charge spreads itself out equally
over the two spheres after touching.) A B A B
touched
then
separated ? ?
+2C
-8C
qA' qB'
qA q B =

29. +2C C
= qA' qB'
-6 C =
-3 C +
-3 C
Each sphere will have half of the total = _________ C
Sphere A: +2C  ______, so it ____________________
Sphere B: -8C  ______, so it ____________________
-3 C
gained 5 C of e-
-3 C
lost 5 C of e-
-3 C
Ex 2: Two identical metals spheres are touched together.
What is the charge on sphere B before it is touched?
(Assume any excess charge spreads itself out equally
over the two spheres after touching.) A B A B
touched
then
separated
-5 C ?
-1C ?

30. qA q B =
qA' qB'
-1C q B =
-5 C C
-1 C C =
-10 C
So sphere B had = _________ C before it touched.
Sphere A: -1C  ______ C, so it ____________________
Sphere B: -9C  ______ C, so it ____________________ -9
gained 4 C of e- -5
lost 4 C of e- -5
Ex 3: Two insulators are rubbed together as shown
below. What is the charge on B after they are rubbed?
(Do NOT assume any excess charge spreads itself out
equally—they are not identical metal spheres.) A B A B
touched
then
separated ?
+2e
+15e
+9e
+15e

31. qA q B =
qA' qB'
+15e +
+2e =
+9 e qB'
+8e =
qB'
Object B will have = _________ e
Object A: +15e  ______, so it ____________________
Object B: +2e  ______, so it ____________________ 8
+9 e
gained 6 e-
lost 6 e-
+8e
Ex 4: Two insulators are rubbed together as shown
below. What is the charge on A before they are rubbed?
(Do NOT assume any excess charge spreads itself out
equally—they are not identical metal spheres.) A B A B
touched
then
separated
+10e
-7e
-6e ?

32. qA q B = qA' qB'
-6 e e
qA e =
qA e =
+4e qA
+11e =
+11
Object A had = _________ e
Object A: +11e  ______, so it ____________________
Object B: -7e  ______, so it ____________________
-6 e
gained 17 e-
lost 17 e-
+10e

33. Don't…
…Smoke
…Drink
…Do Drugs
…Fly
…Kites
…in
…Stormy
…Weather.

34. Open your 3-ring binder to the Worksheet Table of Contents.
Record the title of the worksheet:
All Charged Up WS