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

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. When a pure semiconductor is heated, its resistance_________________?

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

3. 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

4. A semiconductor has ______________ temperature coefficient of resistance?

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

5. A semiconductor has generally_______________valence electrons?

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

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

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

7. A semiconductor is formed by ______________bonds?

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

8. The most commonly used semiconductor is________________?

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

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