Lecture in Electric Charge and Electric Field

This is the lecture in Electric Charge and Electric Field as one topic in Applied Physics subject in taking up Engineering Courses.

State from memory the magnitude and sign of the charge on an electron and proton and also state the mass of each particle.
Apply Coulomb's law to determine the magnitude of the electrical force between point charges separated by a distance r and state whether the force will be one of attraction or repulsion.
State from memory the law of conservation of charge.
Distinguish between an insulator, a conductor, and a semi conductor and give examples of each.
Explain the concept of electric field and determine the resultant electric field at a point some distance from two or more point charges.
Determine the magnitude and direction of the electric force on a charged particle placed in an electric field.
Sketch the electric field pattern in the region between charged objects.
Use Gauss's law to determine the magnitude of the electric field in problems where static electric charge is distributed on a surface which is simple and symmetrical.
Could understand Static Electricity; Electric Charge and Its Conservation
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Understand Photocopy Machines and Computer Printers Use Electrostatics

Two kinds of electric charge – positive and negative
Charge is conserved
Charge on electron:
Conductors: electrons free to move
Insulators: nonconductors
Charge is quantized in units of e
Objects can be charged by conduction or induction
Coulomb’s law:
Electric field is force per unit charge:
Electric field of a point charge:
Electric field can be represented by electric field lines
Static electric field inside conductor is zero; surface field is perpendicular to surface
Electric flux:
Gauss’s law: