Addition of pentavalent impurity to a semiconductor creates many________________?

Related Mcqs:

1. When a pentavalent impurity is added to a pure semiconductor, it becomes________________?

   A. An insulator
   B. An intrinsic semiconductor
   C. p-type semiconductor
   D. n-type semiconductor

2. Addition of trivalent impurity to a semiconductor creates many_______________?

   A. Holes
   B. Free electrons
   C. Valence electrons
   D. Bound electrons

3. The impurity level in an extrinsic semiconductor is about_______________of pure semiconductor ?

   A. 10 atoms for 108 atoms
   B. 1 atom for 108 atoms
   C. 1 atom for 104 atoms
   D. 1 atom for 100 atoms

4. A pentavalent impurity has______________Valence electrons?

   A. 3
   B. 5
   C. 4
   D. 6

5. A trivalent impurity has______________valence electrons?

   A. 4
   B. 5
   C. 6
   D. 3

6. When a pure semiconductor is heated, its resistance_________________?

   A. Goes up
   B. Goes down
   C. Remains the same
   D. Can’t say

7. An n-type semiconductor is______________?

   A. Positively charged
   B. Negatively charged
   C. Electrically neutral
   D. None of the above

8. As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor_______________?

   A. Remains the same
   B. Increases
   C. Decreases
   D. None of the above

9. In a semiconductor, current conduction is due to________________?

   A. Only holes
   B. Only free electrons
   C. Holes and free electrons
   D. None of the above

10. When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on_________________?

    A. Junction capacitance
    B. Minority carriers
    C. Majority carriers
    D. None of the above