Semiconductor MCQs
1. What is a semiconductor?
- A. A material that perfectly conducts electricity
- B. A material that does not conduct electricity
- C. A material with conductivity between a conductor and an insulator
- D. None of the above
Answer: C. A material with conductivity between a conductor and an insulator
2. Which element is commonly used as a semiconductor?
- A. Iron
- B. Copper
- C. Silicon
- D. Aluminum
Answer: C. Silicon
3. What is the energy gap in semiconductors?
- A. The energy difference between valence band and conduction band
- B. The energy required to break a bond
- C. The energy needed to ionize an atom
- D. None of the above
Answer: A. The energy difference between valence band and conduction band
4. What is doping in semiconductors?
- A. Adding impurities to a semiconductor
- B. Removing impurities from a semiconductor
- C. Heating a semiconductor
- D. Cooling a semiconductor
Answer: A. Adding impurities to a semiconductor
5. What is an n-type semiconductor?
- A. A semiconductor with an excess of holes
- B. A semiconductor with an excess of electrons
- C. A semiconductor with no impurities
- D. A semiconductor that does not conduct electricity
Answer: B. A semiconductor with an excess of electrons
6. What is a p-type semiconductor?
- A. A semiconductor with an excess of holes
- B. A semiconductor with an excess of electrons
- C. A semiconductor with no impurities
- D. A semiconductor that does not conduct electricity
Answer: A. A semiconductor with an excess of holes
7. What happens when a p-type and n-type semiconductor are joined?
- A. They form a diode
- B. They form a transistor
- C. They form an insulator
- D. They form a resistor
Answer: A. They form a diode
8. What is the primary use of a semiconductor diode?
- A. To amplify signals
- B. To rectify AC to DC
- C. To store energy
- D. To generate heat
Answer: B. To rectify AC to DC
9. What is the function of a transistor in electronic circuits?
- A. To store data
- B. To switch or amplify signals
- C. To cool down circuits
- D. To increase resistance
Answer: B. To switch or amplify signals
10. What is the primary characteristic of a semiconductor material?
- A. High conductivity
- B. Zero conductivity
- C. Variable conductivity
- D. High malleability
Answer: C. Variable conductivity