RHSA Science: Electricity
Name: _______________
ELECTROSTATICS
Electrostatics is the study of static electric charges.
A static charge means the charge is not moving.
Only one place on the object has a charge.
The three ways to make a static charge are:
1. charging by friction
2. charging by contact
3. charging by induction
1. CHARGING BY FRICTION
When 2 substances are rubbed together one
substance always loses electrons and the other
substance
gains
electrons.
Remember
only
electrons can move. To figure out which substance
will lose electrons use an electrostatic series table.
RHSA Science: Electricity
Name: _______________
ELECTROSTATIC SERIES TABLE
Look at p275 in your text.
In this table the
substance at the top always loses electrons to the
substance at the bottom when they are rubbed
together. If wool is rubbed on plastic polyethylene
the wool loses electrons and has a positive charge.
The plastic polyethylene gains electrons and has a
negative charge.
RHSA Science: Electricity
Name: _______________
ELECTROSTATIC DIAGRAMS
Electrostatic diagrams are drawn to show how two
objects are charged by friction. Here is the diagram
showing a neutral polyethylene (plastic) ruler
rubbed with a neutral piece of wool. Draw and
write down the number of electrons and protons
for each object.
RHSA Science: Electricity
Name: _______________
A) Before Friction
Neutral polyethylene
Neutral Wool
B) After Friction
- the objects have unlike charges and are attracted
to each other
- note only electrons moved. Draw the protons in
the same locations.
Negative Polyethylene
Positive Wool
RHSA Science: Electricity
Name: _______________
Electrostatics
Electrostatics is the study of ____________________________. A static charge means the
______________________________ ____________________ Only one place on the object has
a charge.
The three ways to make a static charge are:
1.
2.
3.
_________________________________
_________________________________
_________________________________
1. Charging by Friction
When 2 substances are rubbed together, _____________
______________________________electrons. Remember only ____________________ can
move. To figure out which substance will lose electrons use an _____________________ table.
(p275 text)
ELECTROSTATIC SERIES TABLE
Look at p275 in your text. In this table the
substance at the _____________ always
____________ ______________________
to the substance at the bottom when they
are rubbed together. If wool is rubbed on
plastic polyethylene the wool __________
electrons and has a ___________ charge.
The plastic polyethylene ________
electrons and has a _________________
charge.
RHSA Science: Electricity
Name: _______________
ELECTROSTATIC DIAGRAMS
Electrostatic diagrams are drawn to show how 2 objects are charged by ________________.
Here is the diagram showing a neutral polyethylene (plastic) ruler rubbed with a neutral piece
of wool. Draw and write down 8 negative electrons and 8 positive protons for each neutral
object.
A) Before Friction
Neutral polyethylene
Neutral Wool
B) After Friction
- the objects have unlike charges and are attracted to each other
- note only electrons moved. Draw the protons in the same locations.
Negative Polyethylene
Positive Wool
http://phet.colorado.edu/en/simulation/balloons