Chapter 1.3a
Chapter 1.3b
Chapter 1.3c
Chapter 1.3d
REVISION EXERCISE ... LATER
< OLD VIDEOS STARTS HERE >
Preparation - Chapter 1.1a, Chapter 1.1b, Chapter 1.1c, Chapter 1.1d
Participation - Assignment P.21 Q13 and P.42 Q22-24, 34, 33
Presentation - Blackboard, Student's Work
Possession
> Like charges repel, unlike charges attract.
> Charged objects also attract neutral objects.
> Charging by friction brings molecules of two objects very close so that electron transfer may occur.
> Rubbed polythene strip is negatively charged, as it has extra electrons.
> Rubbed acetate strip is positively charged, as it has extra protons. (in deficit of electrons)
> All atoms (and objects) are originally neutral, the number of electrons and number of protons are equal.
> Electrons carry negative charge. Each electron carries a charge of -1.6 x 10^-19 C.
> Electrons in insulator are held firmly by their atoms, they cannot flow freely.
> Electrons in conductor may flow freely inside the conductor.
> When charged object attract a conductor, induced charges are produced.
> When charged object attract a conductor, induced charges are also produced but the induced charges are less.
> Insulators are charged by friction, Conductors are charged by sharing or by induction(How?)
> When sharing charges, larger conductor may share more.
> Earthing means sharing charges with the Earth.
> Electrometer may measure the amount of static charge by sharing or induction (How?)
> Van de Graff generator accumulates charges on it dome by continuously charging by friction.
> Electric field is the field (i.e. area) where electric force is experienced by test charges.
> Draw the electric field around a single point charge, between two charges, or between two oppositely charged parallel plates (evenly-spaced parallel field lines) which is a UNIFORM field.
Chapter 1.1a (6:05) 326
Chapter 1.1b (4:28) 211
Chapter 1.1c (9:44) 213
Chapter 1.1d (17:32) 166
Preparation - Chapter 1.2a, Chapter 1.2b, Chapter 1.2c
Participation - Assignment P.34 Q10-12 and P.42 Q27, 28, 32, 36, 37, 42, 49
Presentation - Blackboard, Student's Work
Possession
> Calculation involving Coulomb's law
> Calculating resultant force due to charge configuration (P.24)
> Plot a graph to verify Coulomb's law and determine the permittivity of free space. (P.25)
> Calculating electric field strength around a point charge (P.27)
> Calculating electric field strength between two oppositely charged plates (P.29-31)
> Calculation involving electric potential energy (P.32-33)
Chapter 1.2a (2:10) 246
Chapter 1.2b (3:38) 208
Chapter 1.2c (2:12) 161
REVISION VIDEO - Chapter 1
NEXT Chapter >>