The document defines static electricity as the imbalance of positive and negative charges that occurs when electrons are transferred between objects by rubbing them together. It distinguishes static electricity from current electricity by describing how static charges do not involve a continuous flow of electrons. The document also defines conductors as materials that allow electrons to move freely, creating static shocks, while insulators do not allow electron movement.

1. April 29, 2013

2. 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

3.  Movement of charged particles

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

5.  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

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

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

8.  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
 The objects have become polarized.

9.  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

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

11. Agenda Bell Work
• Pick up Static Electricity
WS and complete• Balloons and
Travoltage
• Notes: Static vs.
Currant Electricity
• Bill Nye: Static
Electricity
HW: Chp 11pg 174-182
RQ’s 1-16

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

13.  Ampere (A) – the rate of electrical flow
 Coulomb (C) – unit of charge
 Relationship between charge and distance
 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