This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The process by which small amounts of additives called impurities are added to the semiconductor material to increase their current flow by adding a few electrons or a few holes is known as: A) Contaminating. B) Base modification. C) Doping. D) Enhancing. Show Answer Correct Answer: C) Doping. 2. A pn junction is formed by A) The recombination of electrons and holes. B) Ionization. C) The boudary of a p-type and an n-type material. D) The collision of a proton and a neutron. Show Answer Correct Answer: C) The boudary of a p-type and an n-type material. 3. What impact did the transition to semiconductor devices have on technology? A) Reduced power efficiency. B) Limited applications. C) Increased size of devices. D) Enabled miniaturization. Show Answer Correct Answer: D) Enabled miniaturization. 4. Zener diodes are mostly used for A) Rectifier circuits. B) Filter Circuits. C) Solar cells. D) Voltage regulator circuits. Show Answer Correct Answer: D) Voltage regulator circuits. 5. How did the development of transistors impact the field of electronics? A) Reduced Efficiency. B) Increased Size. C) Enabled Miniaturization. D) Stagnated Progress. Show Answer Correct Answer: C) Enabled Miniaturization. 6. What is the base of the chip where circuits and transistors are printed A) Chocolate. B) Chips. C) Truffle. D) Wafer. Show Answer Correct Answer: D) Wafer. 7. An atom consists of A) One nucleus and only one electron. B) One nucleus and one or more electrons. C) Protons, electrons and neutrons. D) Answer (b) and (c). Show Answer Correct Answer: D) Answer (b) and (c). 8. Describe the switching behavior of a diode. A) A diode can switch between conducting and blocking states rapidly without any bias. B) A diode conducts current in one direction (forward bias) and blocks it in the opposite direction (reverse bias). C) A diode conducts current in both directions equally. D) A diode only blocks current and does not conduct at all. Show Answer Correct Answer: B) A diode conducts current in one direction (forward bias) and blocks it in the opposite direction (reverse bias). 9. According to this theory, free electrons move in a periodic potential provided by the lattice A) Classical free electron theory. B) Quantum free electron theory. C) Free electron theory. D) Zone theory. Show Answer Correct Answer: D) Zone theory. 10. What is the function of diodes in electronic circuits? A) Diodes in electronic circuits primarily function as one-way valves for current flow. B) Diodes regulate voltage in electronic circuits. C) Diodes amplify signals in electronic circuits. D) Diodes store data in electronic circuits. Show Answer Correct Answer: A) Diodes in electronic circuits primarily function as one-way valves for current flow. 11. An n type semiconductor is negatively charged A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 12. What is the band gap in a semiconductor? A) Energy difference between the valence band and conduction band. B) Energy difference between the p-band and n-band. C) Temperature at which the semiconductor operates. D) Number of electrons in the semiconductor. Show Answer Correct Answer: A) Energy difference between the valence band and conduction band. 13. If a small amount of antimony is added to germanium crystal A) Its resistance is increased. B) It becomes a p-type semiconductor. C) There will be more free electrons than holes in the semiconductor,. D) None of these. Show Answer Correct Answer: C) There will be more free electrons than holes in the semiconductor,. 14. Silicon and Germanium are examples: A) Conductor. B) Insulator. C) Semiconductor. D) Superconductor. Show Answer Correct Answer: C) Semiconductor. 15. What is the primary use of silicon in electronics? A) As a conductor material. B) As a dielectric material. C) As a semiconductor material. D) As an insulator material. Show Answer Correct Answer: C) As a semiconductor material. 16. The majority carrier in an n-type semiconductor are A) Holes. B) Valences electrons. C) Conduction electrons. D) Protons. Show Answer Correct Answer: C) Conduction electrons. 17. The breakdown in a reverse biased p-n junction diode is more likely to occur due to A) Large velocity of the minority charge carriers if the doping concentration is small. B) Large velocity of the minority charge carriers if the doping concentration is large. C) Strong electric field in a depletion region if the doping concentration is small. D) None of these. Show Answer Correct Answer: B) Large velocity of the minority charge carriers if the doping concentration is large. 18. What makes semiconductors super useful in electronic devices? A) Their unique ability to control electricity. B) Their high thermal conductivity. C) Their ability to emit light efficiently. D) Their low cost compared to metals. Show Answer Correct Answer: A) Their unique ability to control electricity. 19. Which of the following is NOT a type of vacuum tube? A) Hexode. B) Tetrode. C) Pentode. D) Triode. Show Answer Correct Answer: A) Hexode. 20. Which of the following materials have very low electrical conductivity and a large energy band gap? A) Superconductors. B) Semiconductors. C) Insulators. D) Metals. Show Answer Correct Answer: C) Insulators. 21. The efficiency of a half wave rectifier is A) 40%. B) 40.6%. C) 46%. D) 81.2%. Show Answer Correct Answer: B) 40.6%. 22. Define a semiconductor. A) A material that has electrical conductivity between that of a conductor and an insulator. B) A material that conducts electricity with no resistance. C) A material that does not conduct electricity at all. D) A material that has high thermal conductivity but low electrical conductivity. Show Answer Correct Answer: A) A material that has electrical conductivity between that of a conductor and an insulator. 23. How do LEDs differ from traditional light bulbs? A) LEDs produce light through electroluminescence, while traditional bulbs use incandescence. B) LEDs emit heat instead of light, unlike traditional bulbs. C) LEDs consume more power than traditional bulbs. D) LEDs are less durable compared to traditional bulbs. Show Answer Correct Answer: A) LEDs produce light through electroluminescence, while traditional bulbs use incandescence. 24. Conductivity of semiconductor ..... with increase in temperature. A) Increases. B) Decreases. C) Remains unchanged. D) None of the above. Show Answer Correct Answer: A) Increases. 25. The energy band in which free electrons exist is know as A) First band. B) Second band. C) Conductive band. D) Valence band. Show Answer Correct Answer: C) Conductive band. ← 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 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 10Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books