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Static Electricity Review
Which part of the atom can move from one atom to another?
++
+
–
––
+
–
Proton (positive charge)
neutron (neutral)
electron (negative charge)
atom nucleus
Which part of the atom can move from one atom to another?
The electron
++
+
–
––
+
– electron (negative charge)
atom nucleus
What happens to make an object have a negative charge?
If electrons > protons negative charge
(gains electrons)
What happens to make an object have a positive charge?
If electrons < protons positive charge
(lost electrons)
What are 3 ways to transfer electric charge
3 ways to transfer electric charge
•Conduction• Induction•Friction
Type of Electron Transfer when Objects make Contact
ConductionExcess electrons pass to a neutral object when touched
Type of Electron Transfer when Electrons move from a distance
without contact
InductionElectrons transferred when a neutral object is near a charged object (in the
electric field)
Type of Electron Transfer when Electrons are moved by force
Frictionmoving electrons by force
Type of Electron Transfer when Electrons are moved by force
What are Insulators?
Insulators
Insulators: materials that do NOT allow electrons to flow through them
easily.
Insulators can be easily charged by friction as the extra electrons gained CANNOT easily escape.
Examples of Insulators?
Insulators: materials that do NOT allow electrons to flow through them
easily.
Conductors and Insulators
Conductors InsulatorsCopper RubberAluminum ClothHumans HairWater PlasticMost metals Glass
Paper
Which of these materials allow electrons to flow through them?
Conductors InsulatorsCopper RubberAluminum ClothHumans HairWater PlasticMost metals Glass
Paper
Which of these materials will build up static electricity?
Conductors InsulatorsCopper RubberAluminum ClothHumans HairWater PlasticMost metals Glass
Paper
What is the difference between insulators and conductors?
Conductors InsulatorsCopper RubberAluminum ClothHumans HairWater PlasticMost metals Glass
Paper
What do the built up electrons create around the charged object?
What do the built up electrons create around the charged object?
An electric field
What will happen?
What will happen?
X will repel like charges repel
What will happen?
Y will attract in a neutral object
like charges repel and the opposites attract
What will happen?
Z will attract opposites attract
What will happen to the man?
How does the man get positively charged?
How does the man get positively charged?
He gets charged by friction
Why does the man get zapped?
Why does the man get zapped?
He is positively charged and the electrons jump to him during electric discharge
Why are many electrical objects grounded?
Why are many electrical objects grounded?
So extra electrons go to the ground and do not build up on materials to shock people
Maybe the caravan was struck by lightning. The van and the balloon have opposite charges so they stick together. The man is charged and has a lot of negative charges.
Why is her hair standing up?
Electric Discharge
