Addition of trivalent impurity to a semiconductor creates many_______________?

Related Mcqs:

1. Addition of pentavalent impurity to a semiconductor creates many________________?

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

2. 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

3. A trivalent impurity has______________valence electrons?

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

4. 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

5. A pentavalent impurity has______________Valence electrons?

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

6. A semiconductor has ______________ temperature coefficient of resistance?

   A. Positive
   B. Zero
   C. Negative
   D. None of the above

7. A hole in a semiconductor is defined as_________________?

   A. A free electron
   B. The incomplete part of an electron pair bond
   C. A free proton
   D. A free neutron

8. At room temperature, an intrinsic semiconductor has_______________?

   A. Many holes only
   B. A few free electrons and holes
   C. Many free electrons only
   D. No holes or free electrons

9. In an intrinsic semiconductor, the number of free electrons_____________?

   A. Equals the number of holes
   B. Is greater than the number of holes
   C. Is less than the number of holes
   D. None of the above

10. At absolute temperature, an intrinsic semiconductor has________________?

    A. A few free electrons
    B. Many holes
    C. Many free electrons
    D. No holes or free electrons