The document discusses static electricity and current electricity. It provides an agenda for a lesson that includes discussing the difference between static and current electricity. It defines static electricity as the imbalance and buildup of electric charges on objects at rest, whereas current electricity involves the flow of electric charges. It describes how rubbing objects can cause the transfer of electrons and creation of static charges.

1. Agenda Bell Work
• Pick up Static Electricity
• Balloons and WS from front desk
Travoltage Activity
• complete
• Notes: Static vs.
Current Electricity
HW: Chp. 11 pg 174-
182

2. April 30, 2012

3. 1. Define and describe static electricity
2. Define and recognize the presence of a charge
3. Distinguish between conductor’s and
insulator’s
4. Describe how static electricity is different than
current electricity

4.  Movement of charged particles

5. Rule 1: Like charges repel one another
Rule 2: Unlike charges attract one another

6.  Electrons carry negative charges
and protons carry positive
charges
 Electrons can move from atom to
atom
 An atom that has more electrons
is negative
 An atom that has less electrons is
positive

7.  The imbalance of positive and negative
charges
 So how do we move electrons from one
place to another?
 By rubbing them together

8.  The build up of electrons creates a static
charge
 The jumping of electrons from one object
to another creates a static shock

9.  When two objects are attracted the atoms
don’t move, only their charges
 The positive part of one object will be
attracted and move toward the negative
charge of the other object

10.  TRIBOELECTRIC SERIES
 your hand
glass
your hair
nylon
wool
fur
silk
paper
cotton
hard rubber
polyester
polyvinylchloride plastic
 Items near the bottom tend to gain
negative charges when rubbed with
something near the top

11.  Clouds become negatively charged relative to
the ground
 Lightning appear as charges are exchanged
between the clouds and the ground

12.  Currents made of flowing electrons, in one
direction

13.  Ampere (A) – the rate of electrical flow
 1 C of charge (6.25 billion billion) per second
 So a wire that carries 5 A has 5 coulombs of
charge per second

14.  Electrons flow only when there is a difference
in electrical pressure – voltage
 Higher the pressure (V) stronger the flow
 Voltage = potential energy/charge
 Wires need a pump that provides the voltage to
cause flow

15. Simple Circuit

16.  Have loosely held electrons that travel very
easily
 Most metals

17.  Materials that do not allow electrons to travel
freely
 Plastic, cloth, glass and dry air