Download Static Electricity guided notes answers - DiMaggio

Static Electricity Notes
Electric Charges:
 protons are the positive charges in an atom
 electrons are the negative charges in an atom
 electrons are the only charge that moves!
 The Law of Electric Charges states:
o Like (++ and --) charges repel
o Opposite (+-) charges attract
 The interaction between charges is called electricity
 The attraction (pull) or repulsion (push) between electric charges is known
as the electric force
 The electric force depends on 2 things:
o The amount of charge
o The distance between charges
 The magnetic field is a region around a charged object where the object’s
electric force is exerted on other charged objects.
Static Electricity Notes
Attract
repel
Static Electricity:
 Static electricity happens when extra electrons collect and stay on an
object for a period of time
 There are 2 types of static charges:
o If an object loses electrons, it has an overall positive charge.
Minus electrons =
o If an object gains electrons, it has an overall negative charge.
Plus electrons =
 The Law of Conservation of charge states that charges are neither created
nor destroyed.
o If an object gives up electrons, another object gains those electrons.
Static Electricity Notes
 There are three methods by which charges can be transferred to build up
static electricity:
o friction
o conduction
o induction
 friction happens when electrons are “wiped” or rubbed from one object
onto another.
o Example: socks in the laundry
 conduction happens when electrons move from one object to another by
direct contact.
o Example: touching a person
 induction happens when electrons move from one object to another
without direct contact
o Example: getting shocked before you touch a door knob
 The loss of static electricity as charges move off an object is called electric
discharge
 Signs of Electric Discharge:
o shock
o flash of light
o crackle sound