Semiconductor Devices
  • 1. What is a diode used for in a circuit?
A) Acts as a switch
B) Amplifies the signal
C) Regulates voltage
D) Allows current to flow in one direction
  • 2. Which material is typically used as the intrinsic semiconductor in a P-N junction diode?
A) Gold
B) Aluminum
C) Silicon
D) Copper
  • 3. What is the function of a transistor?
A) Amplify or switch electronic signals
B) Convert light into electricity
C) Store electrical charge
D) Regulate current
  • 4. Which type of semiconductor material has fewer free electrons than holes?
A) N-type
B) Extrinsic
C) Intrinsic
D) P-type
  • 5. What is the most common type of field-effect transistor?
A) IGBT (Insulated Gate Bipolar Transistor)
B) MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor)
C) BJT (Bipolar Junction Transistor)
D) JFET (Junction Field-Effect Transistor)
  • 6. What is the purpose of a rectifier circuit?
A) Convert AC to DC
B) Amplify weak signals
C) Generate oscillations
D) Filter noise from signal
  • 7. Which type of diode is used to regulate voltage and protect circuits from overvoltage?
A) Zener diode
B) Tunnel diode
C) Light-emitting diode
D) Schottky diode
  • 8. What is the function of a varactor diode?
A) Voltage amplification
B) Temperature sensing
C) High-power rectification
D) Voltage-controlled capacitance
  • 9. What does a P-N junction diode exhibit in the forward bias condition?
A) Increases voltage
B) High resistance
C) Acts as an open switch
D) Low resistance
  • 10. Which of the following is a common application of a diode?
A) Signal amplification
B) Rectification
C) Voltage regulation
D) Data storage
  • 11. What type of semiconductor material has excess free electrons?
A) N-type
B) Intrinsic
C) Extrinsic
D) P-type
  • 12. What is the primary function of a photodiode?
A) Detect magnetic fields
B) Amplify weak signals
C) Regulate voltage
D) Convert light into electrical current
  • 13. What is the main function of a zener diode?
A) Voltage regulation
B) Filtering noise
C) Signal modulation
D) Power amplification
  • 14. Which diode is known for its very low forward voltage drop?
A) Varactor diode
B) Zener diode
C) LED
D) Schottky diode
  • 15. What does the acronym LED stand for?
A) Linear Energy Detector
B) Longitudinal Energy Diode
C) Low-Energy Device
D) Light-Emitting Diode
  • 16. What is the primary function of a tunnel diode?
A) Low-power rectification
B) High-speed switching
C) Temperature sensing
D) Voltage regulation
  • 17. Which type of diode exhibits a negative resistance characteristic?
A) Photodiode
B) Tunnel diode
C) Zener diode
D) Schottky diode
  • 18. What is a semiconductor device?
A) A device used for underwater communication.
B) A device that works only in the presence of a magnet.
C) A device made from a material with semiconductor properties.
D) A device that emits light when exposed to electricity.
  • 19. Which semiconductor device can store charge and be used in memory circuits?
A) Capacitor
B) Resistor
C) Zener diode
D) Inductor
  • 20. What is a common application of a silicon-controlled rectifier (SCR)?
A) Voltage rectification.
B) Signal modulation.
C) Audio amplification.
D) Motor control.
  • 21. Which semiconductor device is commonly used as a surge protector?
A) SCR
B) Transistor
C) Varistor
D) Capacitor
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