The most commonly used semiconductor is________________?

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 ______________ temperature coefficient of resistance?

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

3. A semiconductor has generally_______________valence electrons?

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

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

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

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

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

6. A semiconductor is formed by ______________bonds?

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

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

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

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. The strength of a semiconductor crystal comes from______________?

   A. Forces between nuclei
   B. Forces between protons
   C. Electron-pair bonds
   D. None of the above

10. 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