Transcript Electricity

Electricity
Section 1 & 2
Electric Charge
• Law of Electric
Charges
• Like charges repel
• Opposites attract
• Electric Force
• Force between charged
objects
• Electric Field
• Area around charged
objects
Ways to charge an object
• Friction
• Electrons are wiped off
• Conduction
• Electrons move
directly
• Induction
• Electrons are
rearranged without
touch.
• Charges are not made
or destroyed.
• Electroscopes show a
charge.
Static Electricity
• Electrons build up on
an object.
• Not moving
• Electric discharge
• Loss of static charge
• Shock or lightning
Moving Charges
• Called current.
• Conductors
• Charges move easily
• Insulators
• Charges don’t move
easily
Electric Current
• Travels at speed of
light.
• Two types of current:
• AC (alternating
current)
• Charges change
directions.
• DC (direct current)
• Charges travel one way.
Voltage
• Greater the volts, more
energy.
Resistance
• The opposition to the
flow of charge.
Generating Electrical Energy
• Cells
• Thermocouples
• Photocells