This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 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. 2. In density of states, the shape of metal piece considered initially was A) Sphere. B) Shell. C) Cube. D) Cylinder. Show Answer Correct Answer: C) Cube. 3. 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. 4. The forbiddenn energy gap for Germanium is of the order of A) 0.7 eV. B) 0.3 eV. C) 1.1 eV. D) 10 eV. Show Answer Correct Answer: A) 0.7 eV. 5. List three applications of semiconductors in everyday devices. A) 1. Smartphones 2. Computers 3. Televisions. B) Washing Machines. C) Refrigerators. D) Microwaves. Show Answer Correct Answer: A) 1. Smartphones 2. Computers 3. Televisions. 6. 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. 7. Which of the following materials has a very low conductivity when a voltage is applied? A) Mica. B) Copper. C) Aluminum. D) Silver. Show Answer Correct Answer: A) Mica. 8. Which semiconductor device is commonly used for rectification in power supplies? A) Triac. B) Diodes. C) Transformer. D) Inductor. Show Answer Correct Answer: B) Diodes. 9. In a semiconductor which of the following carries can contribute to the current? A) Electrons. B) Holes. C) Both. D) None. Show Answer Correct Answer: C) Both. 10. Why are IGBTs (Insulated Gate Bipolar Transistors) used in VFDs? A) They provide efficient, high-speed switching for AC motor control. B) They generate resistance in circuits. C) They increase the weight of the motor. D) They prevent current from flowing. Show Answer Correct Answer: A) They provide efficient, high-speed switching for AC motor control. 11. What is the amount of energy required to free an outer shell electron from its orbit to a free state? A) Band gap. B) Electron volt. C) Wavelength. D) Photovoltaic. Show Answer Correct Answer: A) Band gap. 12. Which of the following is a pentavalent impuity added while forming an extrinsic semiconductor? A) (a) Boron. B) Arsenic. C) Indium. D) Gallium. Show Answer Correct Answer: B) Arsenic. 13. Describe the role of a diode in electronic circuits. A) A diode acts as a resistor to limit current flow. B) A diode allows current to flow in one direction, controlling current flow and protecting circuits. C) A diode amplifies electrical signals in both directions. D) A diode stores electrical energy for later use. Show Answer Correct Answer: B) A diode allows current to flow in one direction, controlling current flow and protecting circuits. 14. In the forward bias arrangement of a p-n junction diode, A) The n-end is connected to the positive terminal of the battery. B) The p-end is connected to the positive terminal of the battery. C) The direction of current is from n-end to p-end in the diode. D) The p-end is connected to the negative terminal of the battery. Show Answer Correct Answer: B) The p-end is connected to the positive terminal of the battery. 15. In order to increase voltage, several solar cells are connected in ..... A) Inverters. B) Wires. C) Parallel. D) Series. Show Answer Correct Answer: D) Series. 16. What is a major limitation of vacuum tubes? A) High reliability. B) High power consumption. C) Compact size. D) Low power consumption. Show Answer Correct Answer: B) High power consumption. 17. What is the process of intentionally introducing impurities into a semiconductor to alter its electrical properties? A) Fusion. B) Doping. C) Melting. D) Crystallization. Show Answer Correct Answer: B) Doping. 18. Which among these is NOT the property of a semiconductor? A) Four electrons in the valence band forming covalent bonds. B) At 0 Kelvin semiconductor acts like an insulator. C) Semiconductors have two type of charge carriers. D) Semiconductors are temperature insensitive. Show Answer Correct Answer: D) Semiconductors are temperature insensitive. 19. Name three common semiconductor materials. A) Copper. B) Iron. C) Silicon, Germanium, Gallium Arsenide. D) Aluminum. Show Answer Correct Answer: C) Silicon, Germanium, Gallium Arsenide. 20. Choose the option that is not for the Trivalent impurities: A) *3 valence electrons. B) *produce p-type semiconductors. C) *producing a "hole" . D) Antimony, arsenic, and phosphorus are the examples. Show Answer Correct Answer: D) Antimony, arsenic, and phosphorus are the examples. 21. Electron occupying an energy level can be determined by A) Probability function F(E). B) Probability function Z(E). C) Normalized function F(E). D) Occupation function N(E). Show Answer Correct Answer: A) Probability function F(E). 22. What are the applications of transistors in modern electronics? A) Transistors are primarily used for mechanical movement. B) Transistors are designed for energy storage in batteries. C) Transistors are only used in radio broadcasting. D) Transistors are used in signal amplification, switching, voltage regulation, and as building blocks in integrated circuits for computers and other electronic devices. Show Answer Correct Answer: D) Transistors are used in signal amplification, switching, voltage regulation, and as building blocks in integrated circuits for computers and other electronic devices. 23. How does temperature affect the conductivity of semiconductors? A) Higher temperatures decrease conductivity. B) Temperature has no effect on conductivity. C) Temperature increases conductivity in semiconductors. D) Conductivity is only affected by material type. Show Answer Correct Answer: C) Temperature increases conductivity in semiconductors. 24. What are the different types of transistors and their applications? A) Metal Oxide Semiconductor Field Effect Transistor (MOSFET). B) Darlington Transistor. C) Bipolar Junction Transistor (BJT), Field Effect Transistor (FET), Insulated Gate Bipolar Transistor (IGBT). D) Silicon Controlled Rectifier (SCR). Show Answer Correct Answer: C) Bipolar Junction Transistor (BJT), Field Effect Transistor (FET), Insulated Gate Bipolar Transistor (IGBT). 25. What is the role of a diode in a rectifier circuit? A) To amplify the AC signal before rectification. B) To increase the voltage of the AC signal. C) To store energy for later use in the circuit. D) The role of a diode in a rectifier circuit is to convert AC to DC by allowing current to flow in one direction only. Show Answer Correct Answer: D) The role of a diode in a rectifier circuit is to convert AC to DC by allowing current to flow in one direction only. ← 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 9Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books