In an intrinsic semiconductor, the number of free electrons_____________?

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. 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

3. 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

4. A semiconductor has ______________ temperature coefficient of resistance?

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

5. An n-type semiconductor is______________?

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

6. 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

7. 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

8. 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

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