NEW DELHI: The Solid State and Semiconductor topics test students’ understanding of the properties of materials in various states—whether solid or semiconducting—and their behavior under different conditions. As these subjects delve deep into atomic structures, energy band theory, and electronic devices, mastering them becomes crucial for scoring high in the NEET UG 2025 exam.
As NEET UG 2025 draws closer, students are advised to focus on mastering these foundational concepts in solid-state physics and semiconductors. With tougher MCQs expected, it is essential for students to not just memorize formulas but also understand the underlying principles and their real-world applications.
Join NEET News 2025 Some of the key concepts covered in these MCQs include band gap theory, intrinsic and extrinsic semiconductors, p-n junctions, Zener diodes, Hall effect, and the role of doping in changing the electrical properties of semiconductors.
NEET UG 2025: Quiz on Solid State and Semiconductor
1.
Question: Which of the following is true about the electrical conductivity of a semiconductor?
a) It decreases with an increase in temperature
b) It increases with an increase in temperature
c) It remains constant with an increase in temperature
d) It is independent of temperature
2.
Question: Which type of bonding is present in the structure of a diamond?
a) Metallic bonding
b) Covalent bonding
c) Ionic bonding
d) Van der Waals bonding
3.
Question: The band gap in a semiconductor is typically:
a) Zero
b) Small
c) Large
d) Negative
4.
Question: Which of the following is an example of an intrinsic semiconductor?
a) Silicon
b) Germanium
c) Both Silicon and Germanium
d) Gallium Arsenide
5.
Question: The energy band gap of an insulator is typically:
a) 0 eV
b) 1–2 eV
c) 3–4 eV
d) Greater than 4 eV
6.
Question: In an intrinsic semiconductor, the number of free electrons is equal to the number of:
a) Positive ions
b) Negative ions
c) Holes
d) Protons
7.
Question: The p-type semiconductor is formed by doping the semiconductor with:
a) Group IV element
b) Group V element
c) Group III element
d) Group II element
8.
Question: In a p-n junction, when the forward voltage is applied, the width of the depletion region:
a) Increases
b) Decreases
c) Remains unchanged
d) Becomes zero
9.
Question: The resistance of a semiconductor decreases when:
a) Temperature increases
b) Temperature decreases
c) The material is exposed to high pressure
d) None of the above
10.
Question: Which of the following materials is used for making a photodiode?
a) Silicon
b) Germanium
c) Gallium Arsenide
d) All of the above
11.
Question: Which of the following is the main characteristic of a conductor?
a) High band gap
b) No free electrons
c) Small band gap
d) No holes available for conduction
12.
Question: In the Zener diode, the breakdown occurs in the:
a) Reverse bias region
b) Forward bias region
c) Depletion region
d) Both forward and reverse bias regions
13.
Question: Which of the following is an example of a direct bandgap semiconductor?
a) Silicon
b) Germanium
c) Gallium Arsenide
d) Zinc Oxide
14.
Question: In the Hall effect, if a magnetic field is applied perpendicular to a current-carrying conductor, a potential difference is developed:
a) Parallel to the magnetic field
b) Parallel to the current
c) Perpendicular to both the magnetic field and current
d) In the direction of the magnetic field
15.
Question: The charge carriers in a p-type semiconductor are:
a) Electrons
b) Holes
c) Protons
d) Neutrons
16.
Question: The majority charge carriers in an n-type semiconductor are:
a) Electrons
b) Holes
c) Protons
d) Neutrons
17.
Question: The conductivity of a semiconductor can be increased by:
a) Increasing the temperature
b) Doping with donor impurities
c) Doping with acceptor impurities
d) All of the above
18.
Question: In a semiconductor, what happens to the mobility of charge carriers as the temperature increases?
a) It decreases
b) It increases
c) It remains unchanged
d) It initially increases and then decreases
19.
Question: The value of the energy band gap in an intrinsic semiconductor is generally:
a) 0 eV
b) 1.1 eV
c) 3 eV
d) 4.1 eV
20.
Question: In an n-type semiconductor, the majority charge carriers are:
a) Holes
b) Electrons
c) Both holes and electrons
d) Neutrons
21.
Question: The conductivity of a semiconductor is typically controlled by:
a) Temperature
b) Doping
c) Light exposure
d) All of the above
22.
Question: What is the energy required to move an electron from the valence band to the conduction band called?
a) Ionization energy
b) Band gap energy
c) Work function
d) Activation energy
23.
Question: The p-n junction diode conducts current mainly in:
a) Forward bias
b) Reverse bias
c) Both forward and reverse bias
d) No bias
24.
Question: In which of the following devices does the majority of charge carriers play a significant role?
a) Diode
b) Zener diode
c) Transistor
d) All of the above
25.
Question: What is the most common material used in the fabrication of a photovoltaic cell?
a) Silicon
b) Germanium
c) Gallium Arsenide
d) Copper Oxide
Answer Key:
1. b 2. b 3. b 4. c 5. c 6. c 7. c 8. b 9. a 10. d 11. c 12. a 13. c 14. c 15. b 16. a 17. d 18. a 19. b 20. b 21. d 22. b 23. a 24. d 25. a
Share your quiz scores in the comments section, and our experts will review your performance to provide personalized tips to help you improve your NEET score.
The Solid State and Semiconductor topics in NEET UG 2025 may be challenging, but with the right preparation and strategic practice, aspiring medical students can turn these hurdles into stepping stones. The 25 tough MCQs designed to test students’ understanding of these areas are an excellent resource to reinforce and test their grasp of key concepts ahead of the big day.
