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