static electricity electric charge 12 p+ atoms are neutral same # of protons as electrons
TRANSCRIPT
STATIC ELECTRICITY
Electric charge
12 p+
Atoms are neutral
Same # of protons as electrons
Electric charge
12 p+
Overall charge +2
When electrons are gained or lost, atom has an overall charge (net electric charge)
Attract or repel?
• Opposites Attract
• Like charges repel
+
++
-
--
Are we alike?
• You are made of atoms which have protons and electrons
• Electrons move through you easily
What holds/transfers charge?
Electrons easily move through conductorsconductors
Electrons do not easily move through insulators insulators
(BUT insulators can still become charged)
Three ways to transfer charge:
Charge by frictionfriction
Charge by inductioninduction
Charge by contactcontact
FRICTION:
Charge by frictionfriction
Law of Conservation Charge Rubbing does not create charge, it merely transfers charge.
CONTACT
Charge by contact
Law of Conservation Charge Both objects end up with the same type of charge (but now have less of it).
INDUCTION
Charge by inductioninduction
PHET animation
Law of Conservation Charge Induction separates charge in the object, but the number of protons and electrons remains the same (assuming the object was initially neutral).
More with Induction
Electricity is everywhere!
No electricity