Basic Electronics (3110016) MCQs

MCQs of Diode theory and applications

Showing 11 to 20 out of 108 Questions
1 2 3 4 5 6
11.
A pentavalent impurity has _______ valance electrons.
(a) 3
(b) 5
(c) 4
(d) 6
Answer:

Option (b)

12.
An n-type semiconductor is ________.
(a) Positively charged
(b) Negatively charged
(c) Electrically neutral
(d) None of the above
Answer:

Option (c)

13.
A trivalent impurity has _______ valance electrons.
(a) 4
(b) 5
(c) 6
(d) 3
Answer:

Option (d)

14.
Addition of trivalent impurity to a semiconductor creates many _______.
(a) Holes
(b) Free electrons
(c) Valance electrons
(d) Bound electrons
Answer:

Option (a)

15.
A hole in a semiconductor is defined as _______.
(a) A free electron
(b) The incomplete part of an electron pair bound
(c) A free proton
(d) A free neutron
Answer:

Option (b)

16.
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
Answer:

Option (b)

17.
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
Answer:

Option (c)

18.
A hole and electron in close proximity would tend to _______.
(a) Repel each other
(b) Attract each other
(c) Have no effect on each other
(d) None of the above
Answer:

Option (b)

19.
In a semiconductor, current condition is due _______.
(a) Only to holes
(b) Only to free electrons
(c) To holes and free electrons
(d) None of the above
Answer:

Option (c)

20.
The random motion of holes and free electrons due to thermal agitation is called ______.
(a) Diffusion
(b) Pressure
(c) Ionization
(d) None of the above
Answer:

Option (a)

Showing 11 to 20 out of 108 Questions
1 2 3 4 5 6