This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 2 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When a P-type semiconductor is suitably joined to an N-type semiconductor, then resulting arrangement iscalled ..... A) P-N junction. B) Resistance. C) Transistor. D) Inductor. Show Answer Correct Answer: A) P-N junction. 2. What type of semiconductor device is used to control high-power AC loads? A) Diode. B) Thyristor (SCR). C) Resistor. D) Transformer. Show Answer Correct Answer: B) Thyristor (SCR). 3. Describe the impact of temperature on semiconductor behavior. A) Higher temperatures decrease carrier concentration, reducing conductivity. B) Temperature has no effect on semiconductor behavior. C) Lower temperatures increase mobility without affecting conductivity. D) Higher temperatures increase carrier concentration in semiconductors, enhancing conductivity, but may reduce mobility due to increased scattering. Show Answer Correct Answer: D) Higher temperatures increase carrier concentration in semiconductors, enhancing conductivity, but may reduce mobility due to increased scattering. 4. The minority carriers in P-type silicon are called ..... A) Neutron. B) Proton. C) Electron. D) Hole. Show Answer Correct Answer: C) Electron. 5. Which of the following statements is NOT the diode application in electronic circuit? A) Diode as voltage regulator. B) Diode as Rectifier. C) Diode as Amplifier. D) None of the above. Show Answer Correct Answer: C) Diode as Amplifier. 6. How do transistors differ from diodes in electronic circuits? A) Transistors amplify signals while diodes regulate voltage. B) Transistors store data while diodes amplify signals. C) Transistors control current flow while diodes provide resistance. D) Transistors emit light while diodes amplify signals. Show Answer Correct Answer: A) Transistors amplify signals while diodes regulate voltage. 7. What happen in the N region, when the doping in the P region is high? A) Depletion layer will more toward P region. B) Depletion layer will more toward N region. C) Depletion layer remain unchanged. D) None of the answer. Show Answer Correct Answer: B) Depletion layer will more toward N region. 8. Explain the working principle of a semiconductor transistor. A) A semiconductor transistor works by using a small current to control a larger current. B) A semiconductor transistor works by converting sound waves into electrical signals. C) A semiconductor transistor works by emitting light when a current is applied. D) A semiconductor transistor works by using water to control the flow of electricity. Show Answer Correct Answer: A) A semiconductor transistor works by using a small current to control a larger current. 9. Conductivity of semiconductor increases with increase in temperature, because A) Number density of free charge carriers increases. B) Relaxation time increases. C) Both number density of free charge carriers and relaxation time increases. D) Number density of free charge carriers increases relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density. Show Answer Correct Answer: D) Number density of free charge carriers increases relaxation time decreases but effect of decrease in relaxation time is much less than increase in number density. 10. How do semiconductors contribute to renewable energy technologies? A) Semiconductors are primarily used for thermal insulation in renewable energy systems. B) Semiconductors enable efficient energy conversion and management in solar cells, inverters, and energy storage systems. C) Semiconductors are only relevant in fossil fuel technologies. D) Semiconductors have no impact on energy efficiency in renewable energy applications. Show Answer Correct Answer: B) Semiconductors enable efficient energy conversion and management in solar cells, inverters, and energy storage systems. 11. Which of the following is a pentavalent impurity added while forming an extrinsic semiconductor? A) Boron. B) Arsenic. C) Indium. D) Gallium. Show Answer Correct Answer: B) Arsenic. 12. In reversed biased diode the depletion region acts like an insulator while P-and N-type regions on either sides acts like plates of capacitor, then the junction capacitance formed is called ..... ? A) Diffusion Capacitance C$_{D}$. B) Depletion Region or Transition Capacitance C$_{T.}$. C) All the above. D) None of the above. Show Answer Correct Answer: B) Depletion Region or Transition Capacitance C$_{T.}$. 13. In a forward biased diode, electrons cross the junction and fall into holes. As the electrons fall into the valence band, they radiate energy. In a rectifier diode, this energy is dissipated as heat. However, in the ..... , the energy is dissipated as light. A) Zener diode. B) Light-emitting diode. C) Germanium diode. D) None of the above. Show Answer Correct Answer: B) Light-emitting diode. 14. Explain the concept of a PN junction. A) A PN junction is a layer of insulator that prevents current flow. B) A PN junction is a boundary between p-type and n-type semiconductors that allows current to flow in one direction. C) A PN junction is a type of diode that can conduct in both directions. D) A PN junction is formed by combining two metals to create a conductive path. Show Answer Correct Answer: B) A PN junction is a boundary between p-type and n-type semiconductors that allows current to flow in one direction. 15. Which is one of the properties of semiconductor? A) 4 electrons in outermost orbit, in covalent bonding. B) Atoms vibrate causes electron to break free from the bonds. C) Semiconductors can be pure element such as silicon or germanium. D) Semiconductor has 2 types of charge carriers. Show Answer Correct Answer: C) Semiconductors can be pure element such as silicon or germanium. 16. Which of the following is a compound semiconductor? A) Copper (Cu). B) Gallium Arsenide (GaAs). C) Silicon (Si). D) Germanium (Ge). Show Answer Correct Answer: B) Gallium Arsenide (GaAs). 17. What type of materials support a generous flow of charge when a voltage is applied? A) Conductors. B) Insulators. C) Semiconductors. D) Doping materials. Show Answer Correct Answer: A) Conductors. 18. What is the main idea of semiconductor physics according to the text? A) Study of materials between insulators and conductors. B) Study of insulators. C) Study of conductors. D) Study of resistivity. Show Answer Correct Answer: A) Study of materials between insulators and conductors. 19. ..... (sometimes called "breakdown diodes" ) are designed so that they break down (allow current to pass) when the circuit potential is equal to or in excess of the desired reverse bias voltage. A) Germanium diodes. B) Power rectifier diodes. C) Zener diodes. D) None of the above. Show Answer Correct Answer: C) Zener diodes. 20. A material that conducts electricity well tends to have ..... A) No valence electrons. B) Partially filled bands. C) Completely filled bands. D) Conduction and valence bands that are far apart. Show Answer Correct Answer: B) Partially filled bands. 21. A half-wave rectifier permits current to pass through when alternating current is on the ..... alternation(s) of each cycle. A) Positive. B) Negative. C) Positive and negative. D) Neutral. Show Answer Correct Answer: A) Positive. 22. When the doping level in a crystal diode is increased, the width of the depletion layer is ..... A) Remains the same. B) Decreased. C) Increased. D) None of the answer. Show Answer Correct Answer: C) Increased. 23. Wolfgang Pauli formulated the law stating that ..... electrons can have the same set of quantum numbers. A) No two. B) Only two. C) Only one. D) No one. Show Answer Correct Answer: A) No two. 24. Semiconductor manufacturing company A) Apple. B) Boat. C) Micron. D) Redmi. Show Answer Correct Answer: C) Micron. 25. The majority charge carriers in N-Type semiconductor is: A) Hole. B) Electron. C) All the above. D) None of the above. Show Answer Correct Answer: B) Electron. ← PreviousNext →Related QuizzesClass 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 1Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 3Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 4Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 5Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 6Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 7Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 8Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 9Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 10Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books