Most of the students at this stage in their physics are comfortable with circuit devices like resistors, batteries, switches, and wires which conduct through electron flow. These circuits have generally covered a desk top. Electronics elective module. Describe the action at this junction. Explain why a diode is called a non-linear circuit element and whether or not it is described by Ohm's Law.
Teacher explains basic differences between insulator, conductor, and semi-conductor.
Lists some common examples of all three above. Ask input on possible uses of the three. Draws diagrams of energy levels on board and briefly lectures. Activity 2 - use diffraction grating to study emitted line spectra. Make statements about conduction bands.