Basic Electronics (3110016) MCQs

MCQs of Diode theory and applications

Showing 1 to 10 out of 108 Questions
1 2 3 4 5 6
1.
A semiconductor is formed by ________ bonds.
(a) Covalent
(b) Electrovalent
(c) Co-ordinate
(d) None of the above
Answer:

Option (a)

2.
A semiconductor has ________ temperature coefficient of resistance.
(a) Positive
(b) Zero
(c) Negative
(d) None of the above
Answer:

Option (c)

3.
The most commonly used semiconductor is _______.
(a) Germanium
(b) Silicon
(c) Carbon
(d) Sulphur
Answer:

Option (b)

4.
A semiconductor has generally _______ valence electrons.
(a) 2
(b) 3
(c) 6
(d) 4
Answer:

Option (d)

5.
The resistivity of pure germanium under standard conditions is about______.
(a) 6 × 104Ω cm
(b) 60 Ω cm
(c) 3 × 106Ω cm
(d) 6 × 10-4Ω cm
Answer:

Option (b)

6.
The resistivity of pure silicon is about _______.
(a) 100 Ω cm
(b) 6000 Ω cm
(c) 3 × 105 Ω cm
(d) 1.6 × 10-8 Ω cm
Answer:

Option (b)

7.
When a pure semiconductor is heated, its resistance______.
(a) Goes up
(b) Goes down
(c) Remains the same
(d) Cannot say
Answer:

Option (b)

8.
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
Answer:

Option (c)

9.
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
Answer:

Option (d)

10.
Addition of pentavalent impurity to a semiconductor creates many ________.
(a) Free electrons
(b) Holes
(c) Valance electrons
(d) Bound electrons
Answer:

Option (a)

Showing 1 to 10 out of 108 Questions
1 2 3 4 5 6