Course Work (55%):

Class Work 10% Homework 25% Lab 20% 

Exams: (45%): Quizzes 30%, Final 15%

Average exam score required to achieve

Course Work A B C

100 78 56 33 90 90 68 46 80 102 80 58

Franklin’s Kite

Force between electric charges

Force is stronger if distance is closer

Like charges repel, Unlike charges attract

•http://phet.colorado.edu/en/simulation/build-an-atom

Structure of Atoms

Structure of Atom

Particle Charge Mass (kg)

Electron -e 9.11×10-31

Proton +e 1.67×10-27

Neutron +e 1.68×10-27

e=1.60×10-19 C

Symbol of Atom of element X

AZ X

Z=number of protons; A=number of protons and neutrons

Water Molecule,Ice Crystal

Copper Crystal

Macroscopic objects acquire charge through transfers of electrons or ions

Q1 =0 Q2 =0

N electrons transferred

Q1 =+Ne Q2 = - Ne

Q1+Q2=0

Q1+Q2=0

Charge is conserved: afterbefore

QQ

Induced Charge in a metal

Repulsion causes attached foils to open up

Attached foils

Contact with earth

Metal becomes negatively charged

Dielectric materials