Semiconductor Multiple Choice Questions
1. Which of the following is a semiconductor material?
A) Silver
B) Gold
C) Silicon
D) Copper
Answer: C) Silicon
2. The process of adding impurities to a semiconductor is called?
A) Diffusion
B) Doping
C) Oxidation
D) Etching
Answer: B) Doping
3. What type of semiconductor is formed by doping silicon with phosphorus?
A) P-type
B) N-type
C) Intrinsic
D) Extrinsic
Answer: B) N-type
4. In a P-N junction diode, the region around the junction where no free charge carriers exist is called?
A) Depletion region
B) Saturation region
C) Active region
D) Cutoff region
Answer: A) Depletion region
5. What is the primary function of a Zener diode?
A) Rectification
B) Voltage regulation
C) Amplification
D) Oscillation
Answer: B) Voltage regulation
6. Which of the following materials has the highest electron mobility?
A) Germanium
B) Silicon
C) Gallium Arsenide
D) Silicon Carbide
Answer: C) Gallium Arsenide
7. In a bipolar junction transistor (BJT), which region is lightly doped?
A) Emitter
B) Base
C) Collector
D) None of the above
Answer: B) Base
8. What is the energy gap of silicon at room temperature?
A) 1.1 eV
B) 0.7 eV
C) 1.5 eV
D) 2.0 eV
Answer: A) 1.1 eV
9. Which type of charge carriers are majority in a P-type semiconductor?
A) Electrons
B) Holes
C) Ions
D) Protons
Answer: B) Holes
10. What is the common use of a photodiode?
A) As a voltage regulator
B) To convert electrical signals into light
C) To convert light into electrical signals
D) As an oscillator
Answer: C) To convert light into electrical signals