Multiple Choice Questions and Answers on Semiconductor Theory

Last Updated on September 25, 2023 by Sasmita

Multiple Choice Questions and Answers on Semiconductor Theory

In addition to reading the questions and answers on my site, I would suggest you to check the following, on amazon, as well:

• Question Bank in Electronics & Communication Engineering by Prem R Chadha
• A Handbook on Electronics Engineering – Illustrated Formulae & Key Theory Concepts

Q1. A semiconductor is formed by ……… bonds.

1. Covalent
2. Electrovalent
3. Co-ordinate
4. None of the above

Answer : 1

Q2. A semiconductor has ………… temperature coefficient of resistance.

1. Positive
2. Zero
3. Negative
4. None of the above

Answer : 3

Q3. The most commonly used semiconductor is ………..

1. Germanium
2. Silicon
3. Carbon
4. Sulphur

Answer : 2

Q4. A semiconductor has generally ……………… valence electrons.

1. 2
2. 3
3. 6
4. 4

Answer : 4

Q5. The resistivity of pure germanium under standard conditions is about ……….

1. 6 x 10⁴
2. Ω cm
3. 60
4. Ω cm
5. 3 x 10⁶
6. Ω cm
7. 6 x 10^-4
8. Ω cm

Answer : 2

Q6. The resistivity of a pure silicon is about ……………

1. 100 Ω cm
2. 6000 Ω cm
3. 3 x 10⁵ Ω m
4. 6 x 10^-8 Ω cm

Answer : 2

Q7. When a pure semiconductor is heated, its resistance …………..

1. Goes up
2. Goes down
3. Remains the same
4. Can’t say

Answer : 2

Q8. The strength of a semiconductor crystal comes from ……..

1. Forces between nuclei
2. Forces between protons
3. Electron-pair bonds
4. None of the above

Answer : 3

Q9. When a pentavalent impurity is added to a pure semiconductor, it becomes ………

1. An insulator
2. An intrinsic semiconductor
3. p-type semiconductor
4. n-type semiconductor

Answer : 4

Q10. Addition of pentavalent impurity to a semiconductor creates many ……..

1. Free electrons
2. Holes
3. Valence electrons
4. Bound electrons

Answer : 1