Download Unit 14: Electric Charge

AP Physics: Mechanics
Electric Charge: Chapters 21-23
Objectives
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Students will learn that:
o The fundamental quantity in electrostatics is electric charge. There are two kinds of
charge, positive and negative. Charges of the same sign repel each other and opposite
charges attract each other.
o Conductors are materials that permit charge to move easily and insulators so not allow
charge to move easily
o Coulomb’s law is the basic law of interaction for point electric charges.
o Electric field is the force per unit charge exerted on a test charge at any point.
o Field lines provide a graphical representation of electric fields.
o An electric dipole is a pair of electric charges of equal magnitude but opposite sign
separated by a distance.
o Electric flux is a measure of the flow of electric field through a surface
o Gauss’s law states that the total electric flux through a closed surface equals a constant
time the total charge enclosed by the surface.
o When a charge is placed on a conductor, the charge resides entirely on the surface of
the conductor.
o Work done by the electric force on a charged particle moving in an electric field can be
represented by the change in potential energy
o Potential is potential energy per unit charge which is the amount of work that would be
required to move a positive charge between those points.
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Homework:
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Read the Chapter
PP 828-835 #’s 1,3,5,7,9,15,19,25,27,31,33,41,43,45,49,57,61,63,69,75,89,91
PP 863-868 #’s 1,3,5,7,9,11,13,15,17,25,27,31,33,41,43,45,49,57,61
PP 889-906 #’s all odd #’s
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