This quiz works best with JavaScript enabled. Home > Class 12 > 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 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the difference between a half-wave and full-wave rectifier? A) A half-wave rectifier is more efficient than a full-wave rectifier. B) A half-wave rectifier requires a transformer, while a full-wave rectifier does not. C) A half-wave rectifier converts AC to DC, while a full-wave rectifier does not. D) A half-wave rectifier uses only one half of the AC signal, while a full-wave rectifier uses both halves. Show Answer Correct Answer: D) A half-wave rectifier uses only one half of the AC signal, while a full-wave rectifier uses both halves. 2. The term bias in electronics usually means ..... A) The value of ac voltage in the signal. B) The condition of current through a pn junction. C) The value of dc voltages for the device to operate properly. D) None of the above. Show Answer Correct Answer: C) The value of dc voltages for the device to operate properly. 3. The output voltage for Series voltage regulator is A) Summation of zener and trasistor voltage. B) Subtraction of transistor from zener voltage. C) Subtraction of zener from transistor voltage. D) None of the above. Show Answer Correct Answer: B) Subtraction of transistor from zener voltage. 4. Materials which can conduct electricity better than insulator, but not as well as conductors. This is the definition of A) Diode. B) Semiconductor. C) Conductor. D) Insulator. E) Superconductor. Show Answer Correct Answer: B) Semiconductor. 5. In order to create higher current, solar cells are connected in ..... A) Inverters. B) Series. C) Parallel. D) Wires. Show Answer Correct Answer: C) Parallel. 6. Explain the process of doping in semiconductors. A) Doping is a process of increasing the temperature of semiconductors. B) Doping is the removal of impurities from semiconductors. C) Doping in semiconductors is the intentional introduction of impurities into the crystal structure to alter its electrical properties. D) Doping involves adding water to semiconductors. Show Answer Correct Answer: C) Doping in semiconductors is the intentional introduction of impurities into the crystal structure to alter its electrical properties. 7. The potential difference created across the P-N junction due to the diffusion of electrons and holes is called ..... A) Potential barrier. B) Back emf. C) Instantaneous speed. D) None of the above. Show Answer Correct Answer: A) Potential barrier. 8. The region on either side of the junction which becomes free from the mobile charge carriers is called A) Energy gap region. B) Charge free region. C) Diffusion region. D) Depletion region. Show Answer Correct Answer: D) Depletion region. 9. What is the term for the object that is in between a conductor and an insulator? A) Conductor. B) Semiconductor. C) Insulator. D) Brass. Show Answer Correct Answer: B) Semiconductor. 10. Explain the concept of reverse bias in a diode. A) Reverse bias allows current to flow freely through the diode. B) Reverse bias in a diode is when the voltage is applied in the opposite direction, widening the depletion region and preventing current flow. C) Reverse bias increases the conductivity of the diode. D) Reverse bias occurs when the diode is connected in parallel with the power source. Show Answer Correct Answer: B) Reverse bias in a diode is when the voltage is applied in the opposite direction, widening the depletion region and preventing current flow. 11. How do transistors work in a flashlight? A) They amplify sound to make the flashlight brighter. B) They let electricity flow to light up the bulb. C) They store energy for later use in the flashlight. D) They change the color of the light emitted by the bulb. Show Answer Correct Answer: B) They let electricity flow to light up the bulb. 12. Explain the concept of photonics. A) Photonics is the technology of manipulating matter at the atomic level. B) Photonics is the science and technology of photons, focusing on their generation, manipulation, and detection. C) Photonics deals exclusively with electrical signals and circuits. D) Photonics is the study of sound waves and their applications. Show Answer Correct Answer: B) Photonics is the science and technology of photons, focusing on their generation, manipulation, and detection. 13. Trivalent impurity have ..... no of valence electrons A) 5. B) 4. C) 3. D) None of the above. Show Answer Correct Answer: C) 3. 14. Describe the characteristics of a P-N junction diode. A) A P-N junction diode has the ability to conduct current in both directions. B) A P-N junction diode does not exhibit any bias behavior. C) A P-N junction diode has the ability to conduct current in one direction, exhibits forward and reverse bias behavior, and is commonly used in rectification and switching circuits. D) A P-N junction diode is commonly used in amplification circuits. Show Answer Correct Answer: C) A P-N junction diode has the ability to conduct current in one direction, exhibits forward and reverse bias behavior, and is commonly used in rectification and switching circuits. 15. Name two common semiconductor materials. A) Silicon and Germanium. B) Carbon and Oxygen. C) Aluminum and Copper. D) Gold and Silver. Show Answer Correct Answer: A) Silicon and Germanium. 16. In n-type doping, what is created in the material to contribute to its conductivity? A) Protons. B) Electrons. C) Photons. D) Neutrons. Show Answer Correct Answer: B) Electrons. 17. In p-type material, majority carriers are A) Holes. B) Electrons. C) Current. D) Electricity. Show Answer Correct Answer: A) Holes. 18. The battery connections required to forward bias a pn junction are ..... A) +ve terminal to p and-ve terminal to n. B) -ve terminal to p and +ve terminal to n. C) -ve terminal to p and-ve terminal to n. D) None of the above. Show Answer Correct Answer: A) +ve terminal to p and-ve terminal to n. 19. Semiconductor material doped with pentavalent impurity is called A) Positive type. B) P-type. C) N-type. D) Negative type. Show Answer Correct Answer: C) N-type. 20. Resistance developed in the depletion region is A) R$_{forward }$> R$_{reverse}$. B) R$_{forward < }$R$_{reverse}$. C) R$_{forward =}$ R$_{reverse}$. D) None of these. Show Answer Correct Answer: B) R$_{forward < }$R$_{reverse}$. 21. N an unbiased p-n junction, holes diffuse from the p-region to n-region because A) Free electrons in the n-region attract them. B) They move across the junction by the potential difference. C) Hole concentration in p-region is more as compared to u-region. D) All of these. Show Answer Correct Answer: C) Hole concentration in p-region is more as compared to u-region. 22. What happens when a PN junction is forward-biased? A) The junction heats up significantly. B) The junction becomes an insulator. C) No current flows through the junction. D) Current flows through the junction. Show Answer Correct Answer: D) Current flows through the junction. 23. Explain the concept of biasing in transistors. A) Biasing in transistors is the process of applying an AC voltage to increase current flow. B) Biasing in transistors is the method of cooling transistors to prevent overheating. C) Biasing in transistors is the process of applying a DC voltage to set the operating point for optimal performance. D) Biasing in transistors refers to the physical alignment of transistor components. Show Answer Correct Answer: C) Biasing in transistors is the process of applying a DC voltage to set the operating point for optimal performance. 24. Which material has no band gap? A) Alloys. B) Conductors. C) Semiconductors. D) Insulators. Show Answer Correct Answer: B) Conductors. 25. The street lights use electronic control system that switches the lights on when the surrounding is dark. What is the input sensor of the control system?Lampu jalan menggunakan sistem kawalan elektronik yang menghidupkan lampu ketika sekitarnya gelap. Apakah sensor input sistem kawalan? A) ThermistorTermistor. B) Light emitting diodeDiod pemancar cahaya. C) MicrophoneMikrofon. D) Light dependent resistorPerintang peka cahaya. Show Answer Correct Answer: D) Light dependent resistorPerintang peka cahaya. ← 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 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