Transcript Charges can move from one place to another. KEY CONCEPT

CHAPTER
NEW CHAPTER
Electricity
the BIG idea
Moving electric charges transfer energy.
5.1
Materials can become electrically charged.
5.2
Charges can move from one place to another.
5.3
Electric current is a flow of charge.
CHAPTER OUTLINE
CHAPTER RESOURCES
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Electric charge is a property of matter.
VOCABULARY
electric charge
electric field
static charge
induction
Electrons have a
negative charge.
CHAPTER
RESOURCES
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Electric charge is a property of matter.
VOCABULARY
electric charge
electric field
static charge
induction
Protons have a
positive charge.
CHAPTER
RESOURCES
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Electric charge is a property of matter.
VOCABULARY
electric charge
electric field
static charge
induction
Unlike charges
attract.
CHAPTER
RESOURCES
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Electric charge is a property of matter.
VOCABULARY
electric charge
electric field
static charge
induction
Like charges repel.
CHAPTER
RESOURCES
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Static charges are caused by the movement of electrons,
resulting in an imbalance of positive and negative
charges.
VOCABULARY
electric charge
electric field
static charge
induction
CHAPTER
RESOURCES
At first, a balloon and a glass rod
each have balanced, neutral charges.
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Static charges are caused by the movement of electrons,
resulting in an imbalance of positive and negative
charges.
VOCABULARY
electric charge
electric field
static charge
induction
CHAPTER
RESOURCES
When they touch, electrons move
from the rod to the balloon.
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Static charges are caused by the movement of electrons,
resulting in an imbalance of positive and negative
charges.
VOCABULARY
electric charge
electric field
static charge
induction
CHAPTER
RESOURCES
Afterwards, the balloon has a negative
charge, and the rod has a positive charge.
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
Static charges are caused by the movement of electrons,
resulting in an imbalance of positive and negative
charges.
VOCABULARY
electric charge
electric field
static charge
induction
SIMULATION
Learn more about static
electricity.
CHAPTER
RESOURCES
SECTION
OUTLINE
5.2
CHAPTER HOME
KEY CONCEPT
Charges can move from one place to another.
VOCABULARY
Charge movement is
affected by
• electric potential,
measured in volts
• resistance, measured in
ohms
A conductor has low
resistance.
An insulator has high
resistance.
A ground is the path of
least resistance.
1. Lightning
strikes the
lightning rod,
because the rod
is the path of
least resistance.
electric potential
volt
conductor
insulator
resistance
ohm
3. The ground wire
conducts the charge
into the ground,
where it spreads out
and becomes
harmless.
2. The rod
conducts the
charge to a
conductor cable,
which has low
resistance.
grounding
CHAPTER
RESOURCES
SECTION
OUTLINE
KEY CONCEPT
5.3
CHAPTER HOME
Electric current is a flow of charge.
VOCABULARY
Electric current is measured
in amperes, or amps.
electric current
Ohm's law states that current
equals voltage divided by
resistance.
Ohm’s law
Current =
ampere
electric cell
Voltage
Resistance
I =
V
R
Electrochemical cells produce
electric current through
chemical reactions.
CHAPTER
RESOURCES
SECTION
OUTLINE
5.3
CHAPTER HOME
KEY CONCEPT
Electric current is a flow of charge.
VOCABULARY
Electric current is measured
in amperes, or amps.
electric current
Ohm's law states that current
equals voltage divided by
resistance.
Ohm’s law
Current =
Voltage
Resistance
V
I =
R
Electrochemical cells produce
electric current through
chemical reactions.
ampere
electric cell
SIMULATION
See Ohm’s law in
action.
CHAPTER
RESOURCES
SECTION
OUTLINE
5.1
CHAPTER HOME
KEY CONCEPT
Materials can become electrically charged.
I. Materials can become electrically charged.
A. Electric charge is a property of matter.
B. Static charges are caused by the movement of
electrons.
VOCABULARY
electric charge
electric field
static charge
induction
1. Charging by Contact
2. How Materials Affect Static Charging
3. Charging by Induction
4. Charge Polarization
C. Technology uses static electricity.
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
5.2
KEY CONCEPT
CHAPTER HOME
Charges can move from one place to another.
II. Charges can move from one place to another.
A. Static charges have potential energy.
1. Electric Potential Energy
2. Electric Potential
3. Charge Movement
4. Lightning
B. Materials affect charge movement.
1. Conductors and Insulators
2. Resistance
3. Superconductors
4. Grounding
VOCABULARY
electric potential
volt
conductor
insulator
resistance
ohm
grounding
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
5.3
KEY CONCEPT
CHAPTER HOME
Electric current is a flow of charge.
III. Electric current is a flow of charge.
A. Electric charge can flow continuously.
1. Current, Voltage, and Resistance
2. Ohm’s Law
VOCABULARY
electric current
ampere
Ohm’s law
electric cell
3. Measuring Electricity
B. Electric cells supply electric current.
1. Electrochemical Cells
2. Solar Cells
CHAPTER
RESOURCES
KEY CONCEPT
SUMMARY
CHAPTER HOME
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