explain why

3. (10 points) When a PN junction is reverse biased a) Holes and electrons move away from the junction b) Depletion region decreases c) Movement of holes and electrons is sewed d) Holes and electrons move towards the junction e) None of the above 4. (9 points) When a PN junction is reverse biased a) Reverse current flow ceases b) A very small amount of reverse current called leakage current flows c) Heavy current flow in the reverse circuit d) Electrons do not contribute to the voltage e) All of the above 5. (10 points) For a PN junction, the junction current will be zero when a) The two junctions are short circuited b) Holes and electrons get neutralized by equal numbers c) The number of minority carriers crossing the junction equals the number of majority carriers d) Either minority carriers or majority carriers disappear e) Not enough information is given