a. Explain what is meant by the barrier potential and how it isformed before any bias is applied. [3 marks] b. When the diode isforward biased: i. What happens to the barrier potential? [1 mark]ii. What happens to the depletion region? [1 mark] iii. Indicate onyour diagram the directions in which the holes and electrons move.[2 marks] c. Explain what is meant by the forward voltage drop of adiode. [2 marks] d. When the diode is reverse biased: i. Whathappens to the depletion region? [1 mark] ii. What causes thereverse bias leakage current? [2 marks]
