A trivalent impurity has______________valence electrons?

Related Mcqs:

1. A pentavalent impurity has______________Valence electrons?

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

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

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

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

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

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. 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

6. A semiconductor has generally_______________valence electrons?

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

7. The random motion of holes and free electrons due to thermal agitation is called______________?

   A. Diffusion
   B. Pressure
   C. Ionisation
   D. None of the above

8. If 1 A current flows in a circuit, the number of electrons flowing through this circuit is

   A. 0.625 × 10¹⁹
   B. 1.6 × 10¹⁹
   C. 1.6 × 10-¹⁹
   D. 0.625 × 10-¹⁹

9. If an electrons is allowed to move along the field in a non uniform electric field then it will follow__________________?

   A. Spiral path
   B. Straight line
   C. Curved path
   D. Circular path

10. The number of electrons in one coulomb charge is equal to_______________?

    A. 6.2 x 1018
    B. 1.6 x 1019
    C. 6.2 x 1021
    D. 1.6 x 10-27