This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part Ii > Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In Operational Amplifier-Divider-the output voltage is A) M times multiplication of input voltage. B) D times division of input voltage. C) All the above. D) None of the above. Show Answer Correct Answer: B) D times division of input voltage. 2. Doping of a semiconductor material is termed as A) Adding of impurities to decrease the resistance of the material. B) Adding of impurities to hold the material together. C) Adding of impurities to increase the resistance of the material. D) Removing of impurities to get pure silicon. Show Answer Correct Answer: A) Adding of impurities to decrease the resistance of the material. 3. What is the significance of silicon in semiconductor manufacturing? A) Silicon is significant because it is the most abundant element on Earth. B) Silicon is significant in semiconductor manufacturing because it provides the necessary electrical properties and stability for creating electronic components. C) Silicon is primarily used for its thermal conductivity in manufacturing. D) Silicon is mainly used for its optical properties in fiber optics. Show Answer Correct Answer: B) Silicon is significant in semiconductor manufacturing because it provides the necessary electrical properties and stability for creating electronic components. 4. Majority carriers of N tpye semiconductors are ..... A) Electrons. B) Holes. C) All the above. D) None of the above. Show Answer Correct Answer: A) Electrons. 5. What is the role of semiconductors in modern computing? A) Semiconductors have no impact on data processing or storage. B) Semiconductors are primarily used for creating mechanical parts in computers. C) Semiconductors are only relevant in telecommunications, not computing. D) Semiconductors are crucial for building electronic components that enable data processing and storage in modern computing. Show Answer Correct Answer: D) Semiconductors are crucial for building electronic components that enable data processing and storage in modern computing. 6. In DOS, volume of the sphere of radius n is equal to the A) Volume of cube. B) Number of energy states. C) Number of energy levels. D) None in the list. Show Answer Correct Answer: B) Number of energy states. 7. Define intrinsic semiconductors. A) Intrinsic semiconductors are always n-type materials. B) Intrinsic semiconductors are pure semiconductor materials that have no impurities. C) Intrinsic semiconductors contain various impurities. D) Intrinsic semiconductors are made from metal alloys. Show Answer Correct Answer: B) Intrinsic semiconductors are pure semiconductor materials that have no impurities. 8. What is a key concept in semiconductor physics that explains the behavior of semiconducting materials? A) Theory of Relativity. B) Newton's Laws. C) Band Theory of Solids. D) Quantum Mechanics. Show Answer Correct Answer: C) Band Theory of Solids. 9. A single-crystal semiconductor material with no other types of atoms within the crystal is known as ..... A) Extrinsic semiconductor. B) P-type semiconductor. C) Intrinsic semiconductor. D) N-type semiconductor. Show Answer Correct Answer: C) Intrinsic semiconductor. 10. What are the different types of semiconductor devices? A) Insulators, conductors, and superconductors. B) Vacuum tubes, relays, and potentiometers. C) Resistors, capacitors, and inductors. D) Diodes, transistors, and integrated circuits. Show Answer Correct Answer: D) Diodes, transistors, and integrated circuits. 11. What property of semiconductors changes with temperature? A) They become heavier. B) They conduct electricity better. C) They become perfect insulators. D) They change color. Show Answer Correct Answer: B) They conduct electricity better. 12. What is the behavior of semiconductors with temperature changes? A) Decreased conductivity. B) Increased conductivity. C) No effect. D) Constant conductivity. Show Answer Correct Answer: B) Increased conductivity. 13. ..... have the function of amplifying and switching electrical signals. A) Resistors. B) Capacitors. C) Transistors. D) Inductors. Show Answer Correct Answer: C) Transistors. 14. What is the most common semiconductor material used for producing integrated circuits A) Silicon. B) Tantalum. C) Quartz. D) Diamond. Show Answer Correct Answer: A) Silicon. 15. Valence electrons of Phosperous is ..... A) 3. B) 5. C) 4. D) None of the above. Show Answer Correct Answer: B) 5. 16. What is a photodetector and how does it function? A) A photodetector is a device that amplifies sound waves. B) A photodetector is a device that detects light and converts it into an electrical signal. C) A photodetector is a type of lens that focuses light. D) A photodetector is used to store electrical energy. Show Answer Correct Answer: B) A photodetector is a device that detects light and converts it into an electrical signal. 17. The p-n junction which generates an emf when solar radiation falls on it, with no external bias applied, is a A) Zener Diode. B) Solar cell. C) Photodiode. D) Light Emitting diode. Show Answer Correct Answer: B) Solar cell. 18. The small amount of current that flows in reversed biased diode before breakdown is called? A) Reverse Saturation Current. B) Leakage Current. C) Forward Current. D) None of the above. Show Answer Correct Answer: B) Leakage Current. 19. What is created in the material during p-type doping to act as positive charge carriers? A) Protons. B) Electrons. C) Neutrons. D) Holes. Show Answer Correct Answer: D) Holes. 20. Impure semiconductor is ..... A) Intrinsic. B) Extrinsic. C) Nutral. D) None of the above. Show Answer Correct Answer: B) Extrinsic. 21. Wavelength produced by smeiconductor laser is A) 5000 Angstrom. B) 6000 Angstrom. C) 8400 to 8600 Angstrom. D) None. Show Answer Correct Answer: C) 8400 to 8600 Angstrom. 22. Why are diodes important in preventing current flow in the reverse direction? A) To amplify the current flow in the reverse direction. B) To provide a one-way path for current flow. C) To generate heat when current flows in the reverse direction. D) To increase resistance in the forward direction. Show Answer Correct Answer: B) To provide a one-way path for current flow. 23. Basic building blocks of all electronic circuits are A) Devices in which there is an uncontrolled flow of electrons. B) Devices in which there is a controlled flow of electrons. C) Devices in which there is a flow of electrons. D) Devices in which there is no flow of electrons. Show Answer Correct Answer: B) Devices in which there is a controlled flow of electrons. 24. The ..... is simply a variable-capacitance diode. A) Capacadode. B) LED. C) Varactor. D) None of the above. Show Answer Correct Answer: C) Varactor. 25. Explain the function of a transistor. A) A transistor converts electrical energy into mechanical energy. B) A transistor regulates the flow of water in plumbing systems. C) A transistor acts as a switch or amplifier for electrical signals. D) A transistor is used to store electrical energy. Show Answer Correct Answer: C) A transistor acts as a switch or amplifier for electrical signals. 26. What is a photovoltaic cell? A) A type of battery that stores electrical energy for later use. B) A solar panel that only collects heat energy. C) A device that converts light energy directly into electrical energy using semiconductors. D) A device that converts electrical energy into mechanical energy. Show Answer Correct Answer: C) A device that converts light energy directly into electrical energy using semiconductors. 27. Emits light when a current passes through it A) Resistor. B) Diode. C) Fuse. D) LED. Show Answer Correct Answer: D) LED. 28. Semiconductor is defined as A) Substance for the width of the forbiden energy region is 1eV. B) Germanium and silicon are having band gap of 0.785 and 1.21eV respectively. C) These are known as intrinsic semiconductor. D) The forbiden band seprates the filled valence region electronfrom the vacant band. Show Answer Correct Answer: A) Substance for the width of the forbiden energy region is 1eV. 29. In Operational Amplifier-Adder Application-the output voltage will be equal to A) Sum of all input voltages. B) Subtraction from one to input voltage to another. C) All the above. D) None of the above. Show Answer Correct Answer: A) Sum of all input voltages. 30. The mobility of free electrons is greater than that of free holes because A) They require low energy to continue their motion. B) They are light. C) They carry negative charge. D) They carry negative charge. Show Answer Correct Answer: B) They are light. 31. Which of the following is a famous semiconductor device? A) Transistors. B) Cables. C) Resistors. D) Batteries. Show Answer Correct Answer: A) Transistors. 32. What are the advantages of using diodes in electronic circuits? A) Diodes are used for amplifying signals. B) Diodes increase current flow in circuits. C) Diodes provide rectification, protect against reverse polarity, enable signal modulation, and assist in voltage regulation. D) Diodes can replace resistors in all applications. Show Answer Correct Answer: C) Diodes provide rectification, protect against reverse polarity, enable signal modulation, and assist in voltage regulation. 33. What type of materials have an intermediate conductivity between insulators and conductors? A) Superconductors. B) Metals. C) Insulators. D) Semiconductors. Show Answer Correct Answer: D) Semiconductors. 34. Which of the following is an example of a conductor? A) Glass. B) Rubber. C) Copper (Cu). D) Silicon (Si). Show Answer Correct Answer: C) Copper (Cu). 35. What is the range of electron energies higher than the valence band where electrons are free to move and can contribute to the flow of charge? A) Valence band. B) Conduction band. C) Forbidden band gap. D) Resistivity. Show Answer Correct Answer: B) Conduction band. 36. Which of the following is an advantage of semiconductor devices? A) High power requirement. B) High voltage operation. C) Compact size. D) Fragility. Show Answer Correct Answer: C) Compact size. 37. The ..... is a three-terminal device primarily used to amplify signals and control current within a circuit. A) Transistor. B) Potentiometer. C) Diode. D) None of the above. Show Answer Correct Answer: A) Transistor. 38. Is the element added to the type N semiconductors. A) Argon. B) Boron. C) Antimony. D) Chlorine. Show Answer Correct Answer: C) Antimony. 39. The characteristics of p-type semiconductors include A) Easy to conduct electricity. B) Has tendency to gain electron. C) Majority carriers are electron. D) Has tendency to donor electron. Show Answer Correct Answer: B) Has tendency to gain electron. 40. How can you analyze a diode in a simple circuit? A) Measure voltage and current across the diode in a circuit. B) Connect the diode in reverse bias and measure capacitance. C) Observe the diode's physical appearance for damage. D) Check the resistance of the diode with a multimeter. Show Answer Correct Answer: A) Measure voltage and current across the diode in a circuit. 41. Process of losing Valence electrons in an atom is called A) Excitation. B) Amplification. C) Attenuation. D) Ionization. Show Answer Correct Answer: D) Ionization. 42. What is the function of a rectifier circuit? A) The function of a rectifier circuit is to convert AC to DC. B) To store electrical energy. C) To amplify weak signals. D) To filter out noise from a signal. Show Answer Correct Answer: A) The function of a rectifier circuit is to convert AC to DC. 43. Amount of energy that Valence electron must have in order to jump from Valence band to conduction band is called A) Energy gap. B) Energy band. C) Energy baud. D) Energy core. Show Answer Correct Answer: A) Energy gap. 44. In solids, ..... in outer most orbits of atoms determine its electrical properties A) Positron. B) Electrons. C) Neutron. D) Protons. Show Answer Correct Answer: B) Electrons. 45. Describe the role of diodes in signal modulation. A) Diodes are used to store signals for later transmission. B) Diodes shape and modulate signals by allowing current to flow in one direction, essential for AM and FM applications. C) Diodes amplify signals by increasing their voltage levels. D) Diodes convert analog signals into digital signals. Show Answer Correct Answer: B) Diodes shape and modulate signals by allowing current to flow in one direction, essential for AM and FM applications. 46. The flow of holes from the p-region uncovers ..... charged acceptor ions. A) Current. B) Negatively. C) Positively. D) Voltage. Show Answer Correct Answer: B) Negatively. 47. What is the conductivity range of insulators? A) Intermediate. B) Variable. C) High. D) Very low. Show Answer Correct Answer: D) Very low. 48. What type of semiconductor is Silicon (Si)? A) Organic. B) Polymeric. C) Elemental. D) Compound. Show Answer Correct Answer: C) Elemental. 49. The resistivity of a semiconductor lies between A) (a)10$^{-6 }$$\Omega$m to10$^{-8 }$$\Omega$m. B) N(b) 10$^{8 }$$\Omega$m to10$^{14 }$$\Omega$m. C) (c) 10$^{-2 }$$\Omega$m to10$^{4 }$$\Omega$m. D) (d) none of these. Show Answer Correct Answer: C) (c) 10$^{-2 }$$\Omega$m to10$^{4 }$$\Omega$m. 50. Explain how a diode allows current to flow in one direction only. A) A diode allows current to flow in both directions equally. B) A diode allows current to flow in one direction by permitting flow when forward biased and blocking flow when reverse biased. C) A diode can amplify current in any direction. D) A diode only works when there is no voltage applied. Show Answer Correct Answer: B) A diode allows current to flow in one direction by permitting flow when forward biased and blocking flow when reverse biased. 51. The phrase "holes in a semiconductor" A) Holes may serve as carrier of electriciy. B) Empty energy level in an otherwise filled valence band. C) Mechanism by which a hole contribute to conductivity. D) Results in allowable energy states which lie in the forbidden energy gap. Show Answer Correct Answer: B) Empty energy level in an otherwise filled valence band. 52. What are the advantages of using semiconductors in electronics? A) Low reliability in extreme conditions. B) High cost of production. C) Large physical size. D) Advantages of using semiconductors in electronics include low power consumption, small size, high efficiency, and integration of multiple functions. Show Answer Correct Answer: D) Advantages of using semiconductors in electronics include low power consumption, small size, high efficiency, and integration of multiple functions. 53. In PN junction forward biasing width of the depletion region A) Increases. B) Decreases. C) All the above. D) None of the above. Show Answer Correct Answer: B) Decreases. 54. What is the main difference between N-type and P-type semiconductors? A) N-type semiconductors are made of metals; P-type semiconductors are made of insulators. B) N-type semiconductors have holes; P-type semiconductors have extra electrons. C) N-type semiconductors have extra electrons; P-type semiconductors have holes. D) N-type semiconductors conduct only in reverse; P-type semiconductors conduct only in forward. Show Answer Correct Answer: C) N-type semiconductors have extra electrons; P-type semiconductors have holes. 55. The current due to result of difference of carrier concentration from one region to another region is called? A) Drift Current. B) Diffusion Current. C) All the above. D) None of the above. Show Answer Correct Answer: B) Diffusion Current. 56. In density of states, the shape of metal piece considered initially was A) Cube. B) Sphere. C) Shell. D) Cylinder. Show Answer Correct Answer: A) Cube. 57. What materials are commonly used in diode construction? A) Copper, aluminum, silver. B) Plastic, rubber, glass. C) Iron, nickel, cobalt. D) Silicon, germanium, gallium arsenide. Show Answer Correct Answer: D) Silicon, germanium, gallium arsenide. 58. The forbiddenn energy gap for Germanium is of the order of A) 0.3 eV. B) 10 eV. C) 0.7 eV. D) 1.1 eV. Show Answer Correct Answer: C) 0.7 eV. 59. List three applications of semiconductors in everyday devices. A) Microwaves. B) Washing Machines. C) 1. Smartphones 2. Computers 3. Televisions. D) Refrigerators. Show Answer Correct Answer: C) 1. Smartphones 2. Computers 3. Televisions. 60. What is the purpose of a Schottky diode? A) The purpose of a Schottky diode is to provide fast switching and low voltage drop in electronic circuits. B) To act as a current amplifier. C) To store electrical energy efficiently. D) To increase the voltage in a circuit. Show Answer Correct Answer: A) The purpose of a Schottky diode is to provide fast switching and low voltage drop in electronic circuits. ← PreviousNext →Related QuizzesScience QuizzesClass 12 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 6Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 7Class 12 Physics (Part Ii) Chapter 10 Wave Optics QuizClass 12 Physics (Part Ii) Chapter 11 Dual Nature Of Radiation And Matter Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books