Electric field

5.1  Electric fields:

1. Electric charge        What neutral means?         Conservation of the charge          Charging  a dielectric by rubbing       Charging a conductor by induction       Coulomb's law

2. Definition of electric field          Units   for the magnitude          Direction

   • Motion of positive or negative charges in uniform electric field

   • Net force on a dipole 

   • Net torque on a dipole

3. Electric field  of point charges         Superposition principle

4.  Visualization of vector field by electric field lines - density and orientation

   • Sphere - radial field

   • Infinite  plane - uniform field

   • Electric dipole - dipole field

5. Metals           Surface charge density       Curvature          Faraday cage

6. Polarization of matter