Transcript TOPIC: Electricity AIM: What is an electric charge?

AIM: How is an electric charge formed?
Date
Assignment
Mon
Tues
•Textbook Page 399 #1,2,4
Wed
•Calculating currents
worksheet
Thurs
•Textbook page 405# 7,
page 413 # 6
Fri
•Textbook page 430 # 1,3,4,5
Is the result of an electrical
charge flowing
Electrical charge
is when matter experiences a
force (movement)
Smallest particle
of matter
Made up of 3 subatomic
particles
1.PROTONS
in the nucleus - Positive charge
2.NEUTRONS
in the nucleus - No charge
3.ELECTRONS
outside the nucleus - Negative
charge
Protons
Neutrons
Electrons
How can charges be detected?
•Electroscope
•Metal rod with 2 thin metal
leaves at 1 end
• Charged object touches it  charge travels
into leaves  leaves spread apart (Like
charges repel)
•Pulls objects together
•Between opposite
charges (Opposites
attract)
•Electrons & protons
+
-
•Pushes objects apart
•Like charges repel
•Electrons repel each
other
•Protons repel each
other
ATOMS
are free of
charge (neutral)
when
•# of protons equals # of
electrons
•Makes atom neutral (no
net charge)
Objects become charged when…..
1. Lose electrons, becomes
positively charge
Lose
electron
8 protons, 8
electrons = no
charge
8 protons, 7
electrons = Positively
charged
2. Gain electrons, becomes negatively
charged
Gain
electron
8 protons, 8
electrons = no
charge
8 protons,
electrons =
Negatively
charged
9
Negative
?
Positive
Charges can be transferred. Before the shoe
scuffs against the carpet, both the sole of the shoe
and them carpet are neutral. As the shoe scuffs the
carpet, electrons are transported from the carpet to
the sole of the shoe.
REDO
INCORPORATE SLIDES BELOW
REORDER
CHANGE
Electricity
Is the result of
an electrical
charge flowing
Inside an atom,
electrons have a
negative charge
and protons
have a positive
charge. These
particles attract
each other.
A charge is a measure
of the extra positive
or negative
particles that an
object has.
Static Electricity
Static electricity is the
charge that stays on
an object.
Unlike charges attract
each other, and like
charges repel each
other.
Current Electricity
The steady flow of
electricity along a
wire or a path called
a circuit.
Circuit means to “go
around.”
Types of Circuits
•A series circuit •A parallel
is a circuit that circuit has
has only one
more than one
path for the
path for
current.
current to
travel.
•Lights in our
homes are
wired in
parallel
circuits.
Conductor
•A conductor is a material
that current can pass through
easily, like metals.
Resistor
•A resistor is a material that
resists, but doesn’t stop the
flow of current.
Insulator
•An insulator is a material
that current cannot pass
through easily, like plastic.
Electric Cell
•An electric cell
supplies
energy to move
charges
through a
circuit, like a
battery.