Java applet to show a field
Explain meaning of permittivity, include absolute and relative values.
Explain action of dielectric in terms of capacitance - preparation for next section
Application, e.g. estimation of forces at closest approach in Rutherford alpha particle scattering
Define E by comparison with gravitational fields, NB can have +ve and -ve charge and therefore attractive and repulsive forces.
Draw diagrams to show field patterns for radial and uniform fields.
PS 1.2, 2.2 / AT b Students can investigate the patterns of various field configurations using conducting paper (2D) or electrolytic tank (3D).
Motion of charged particles in an electric field eg. trajectory of particle beams - Use analogy with motion in a gravitational field ie. projectile motion.
Recognise difference in behaviour between +ve and -ve charges.