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