The strength of a semiconductor crystal comes from______________?

Related Mcqs:

1. 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

2. A semiconductor has generally_______________valence electrons?

   A. 2
   B. 3
   C. 6
   D. 4

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

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

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

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

5. An n-type semiconductor is______________?

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

6. A semiconductor is formed by ______________bonds?

   A. Covalent
   B. Electrovalent
   C. Co-ordinate
   D. None of the above

7. The most commonly used semiconductor is________________?

   A. Germanium
   B. Silicon
   C. Carbon
   D. Sulphur

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

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

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