Electric Charge and Static Electricity
Priscila Larrauri & Luci Artigas
Electric Charge
• Def-A property that causes subatomic particles such as protons and electrons to attract or repel each other.
• Electric charges move in a flash through a lightning bolt.
Electric Charges
• Def-A net electric charge is produce by an excess or shortage of electrons .
• ( C) Coulombs is the unit of electric charges
-Quik Math • Takes 6.24X1018 to produce a coulomb
Electric Forces• Def-The force of attraction or repulsion
between electrically charged objects.• Charges repel, and opposite charges attract.
Electric Fields• Def-The effect an electric charge has on other
charges in the space around it.• The strength of an electric field depends o
the amount of charge that produces the field and on the distance from the charge.
Static Electricity and Charging
• Def-The study of the behavior of electric charges, including how charge is transferred between objects.
• Charge can be transferred by friction, by contact, and by induction.
• Law of conservation charge- The total charge in an isolated system is constant.
Charging by friction • Ex) Balloon pick up a net charge by rubbing a
it on your hair• Electrons move from hair to balloon because
atoms in rubber have grater attraction for electrons than atoms in hair. Because your hair loses electrons
Charging by contact
• A Van de Graaff generator has charge the metal sphere. By touching it transfer the charge that make the hair repel each other because like charges repel
• She acquires a charge large enough to make her hair stand.
Charing by intruduction• Def- Transfer of charge with out contact between
materials.• If you come with a negative charge t the doorknob
it induces charges to move within the metal doorknob.
Static Discharge
• Occurs when a pathway through which charges can move forms suddenly
• It will not travel through air but it becomes charge when the gap between the objects is small.
• Ex) Lighting storm the air is charge from clouds to earth.
Topic Main Idea
Electric Charge
Eelctric Force
Electric Field
Static Electricity
• http://www.youtube.com/watch?v=F6v8wm7_vdQ&feature=plcp
• http://www.youtube.com/watch?feature=endscreen&NR=1&v=VhWQ-r1LYXY
