Solve these physics exams questions with detailed solutions. I took these questions from past exams. I want to revise on these it's like to come up in my upcoming exams. Be able to draw diagrams

Understand the diode equation, and be able to quote its limits for positive and negative high voltages. Be able to explain drift and diffusion currents in a diode (see S1 for similar in a metal too) and quote equations for both. Be able to understand and use the equation for diffusion current (see S1 notes!). Understand current flow under zero, positive and negative bias in a Schottky diode. e Know the band diagram for Schottky and Ohmic contacts and their definition in terms of workfunction of the metal and semiconductor. e Be able to draw band structure, electric field, potential and potential energy for a pn junction. e Be able to explain the four rules one needs to apply when contructing the bandstructure of a devices composed from multiple layers of metal and semiconductor. e Be able to apply these rules to draw the bandstructure of a pn_junction. e Know where the charge resides in a pn junction and why the electric field develops. e Be able to draw electric field, potential, and potential energy and charge density, each as a function of distance in a pn junction