PN Junction Diode Multiple Choice Questions Answers


21. 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 seized

   D.Holes and electrons move towards the junction


✔ View Answer


A.Holes and electrons move away from the junction

✍ Your Comments

Your name:

Your Email:

Your Comments:



22. 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.All of the above


✔ View Answer


B.A very small amount of reverse current called leakage current flows

✍ Your Comments

Your name:

Your Email:

Your Comments:



23. 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


✔ View Answer


C.The number of minority carriers crossing the junction equals the number of majority carriers

✍ Your Comments

Your name:

Your Email:

Your Comments:



24. A reversed-biased PN junction has


   A.Almost zero current

   B.A very narrow depletion layer

   C.A net hole current

   D.A net electron current


✔ View Answer


A.Almost zero current

✍ Your Comments

Your name:

Your Email:

Your Comments:



25. Barrier potential in a PN junction is caused by


   A.Flow of drift current

   B.Diffusion of majority carriers across the junction

   C.Migration of minority carriers across the junction

   D.Thermally-generated electrons and holes


✔ View Answer


B.Diffusion of majority carriers across the junction

✍ Your Comments

Your name:

Your Email:

Your Comments:





< 1 2 3 4 5 6 7 8 9 10 Next>

Mcq




Enter Your Suggestion/Comments Here










Can't read the image? Click here to refresh