This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the role of diodes in electronic devices? A) To increase the device's weight. B) To let electricity flow in both directions. C) To only let electricity flow in one direction. D) To store electricity. Show Answer Correct Answer: C) To only let electricity flow in one direction. 2. One function of the transistor is to ..... ? A) Rectify. B) Amplify. C) Limit. D) Control. Show Answer Correct Answer: B) Amplify. 3. What year marked the invention of the transistor? A) 1945. B) 1930. C) 1948. D) 1950. Show Answer Correct Answer: C) 1948. 4. What is the difference between ideal and real diodes? A) Ideal diodes have a forward voltage drop, while real diodes do not. B) Real diodes have no resistance, while ideal diodes have a reverse leakage current. C) Ideal diodes can conduct in both directions, while real diodes can only conduct in one direction. D) Ideal diodes have no resistance or leakage, while real diodes have a forward voltage drop and reverse leakage current. Show Answer Correct Answer: D) Ideal diodes have no resistance or leakage, while real diodes have a forward voltage drop and reverse leakage current. 5. When an atom donates one of its valence electron, then it becomes A) Positive Immobile ion. B) Negative Immobile Ion. C) All the above. D) None of the above. Show Answer Correct Answer: A) Positive Immobile ion. 6. What is the significance of the band gap in semiconductors? A) It determines the color of the semiconductor. B) It determines the energy required for electrons to move from the valence band to the conduction band. C) It affects the thermal conductivity of the material. D) It indicates the maximum temperature the semiconductor can withstand. Show Answer Correct Answer: B) It determines the energy required for electrons to move from the valence band to the conduction band. 7. Which of the following is an example of an organic semiconductor? A) Copper. B) Silicon. C) Anthracene. D) Gallium Arsenide. Show Answer Correct Answer: C) Anthracene. 8. The brakdown that occurs due to Ionization by an Electric Field below reverse voltage of even 5 volt is called: A) Avalanche Breakdown. B) Zener Breakdown. C) All the above. D) None of the above. Show Answer Correct Answer: B) Zener Breakdown. 9. ..... is an injection laser. A) He-Ne laser. B) Semiconductor laser. C) Molecular gas laser. D) Solid state laser. Show Answer Correct Answer: B) Semiconductor laser. 10. What are the 3 legs of a transistor called? A) Base, Electrode, Commiter. B) Bridge, Collector, Extruder. C) Base, Collector, Emitter. D) Brake, Collection, Emit. Show Answer Correct Answer: C) Base, Collector, Emitter. 11. What is the significance of the depletion region in a semiconductor? A) The depletion region is significant because it creates an electric field that controls current flow in semiconductor devices. B) The depletion region has no effect on the performance of semiconductor devices. C) The depletion region is where electrons are generated in a semiconductor. D) The depletion region increases conductivity in semiconductors. Show Answer Correct Answer: A) The depletion region is significant because it creates an electric field that controls current flow in semiconductor devices. 12. A pure semiconductor behaves like an insulator at 0 K because A) There is no recombination of electrons with holes. B) Drift velocity of free electrons is very small. C) Free electrons are not available for current conduction. D) Energy possessed by electrons at that low temperature is almost zero. Show Answer Correct Answer: C) Free electrons are not available for current conduction. 13. What is the significance of the forward voltage drop in a diode? A) It indicates the maximum voltage a diode can withstand. B) It determines the resistance of the diode when reverse biased. C) It measures the current flowing through the diode. D) The forward voltage drop indicates the minimum voltage needed for a diode to conduct current. Show Answer Correct Answer: D) The forward voltage drop indicates the minimum voltage needed for a diode to conduct current. 14. A Diode has ..... A) Two pn junction. B) One pn junction. C) Three pn junction. D) None of the above. Show Answer Correct Answer: B) One pn junction. 15. How many valence electrons does semiconductors have? A) 4. B) 8. C) 2. D) 0. Show Answer Correct Answer: A) 4. 16. BJTs and IGBTs generate low on-state conduction power losses. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 17. What is a key benefit of semiconductors over vacuum tubes? A) High voltage operation. B) High power consumption. C) Long lifespan. D) Require vacuum. Show Answer Correct Answer: C) Long lifespan. 18. What unique ability do semiconductors have? A) They are as bad at conducting electricity as insulators. B) They can only conduct electricity in a vacuum. C) They can conduct electricity as well as metals. D) They have the unique ability to control electricity. Show Answer Correct Answer: D) They have the unique ability to control electricity. 19. A full-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: C) Positive and negative. 20. The current in a semiconductor is produced by A) Electron only. B) Holes only. C) Negative ions. D) Both electrons and holes. Show Answer Correct Answer: D) Both electrons and holes. 21. Explain the function of a transistor in electronic circuits. A) A transistor stores electrical energy in circuits. B) A transistor acts as a resistor in electronic circuits. C) A transistor converts AC to DC in electronic circuits. D) A transistor functions as a switch or amplifier in electronic circuits. Show Answer Correct Answer: D) A transistor functions as a switch or amplifier in electronic circuits. 22. Material that has free "holes" instead of electrons is what type of silicon? A) P-type. B) N-type. C) Z-type. D) H-type. Show Answer Correct Answer: A) P-type. 23. Which of the following is a material that does NOT allow current to easily flow through it? A) Conductor. B) Insulator. C) Semiconductor. D) Silicon. Show Answer Correct Answer: B) Insulator. 24. What is the meaning of rectification? A) A process of smoothing using a capacitor. B) A process of adding impurities to pure materials. C) A process of converting an alternating current into a direct current by using a diode. D) None of the above. Show Answer Correct Answer: C) A process of converting an alternating current into a direct current by using a diode. 25. Holes in n-type materials are called A) Minority carrier. B) Majority carrier. C) Diffusion current. D) Hole current. Show Answer Correct Answer: A) Minority carrier. ← PreviousNext →Related QuizzesClass 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 1Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 2Class 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