This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials – Quiz 6 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part Ii) Chapter 14 Semiconductor Electronics Materials Quiz 6 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is the role of the p-n junction in a diode? A) The p-n junction allows current to flow in one direction, acting as a rectifier. B) The p-n junction stores electrical energy like a capacitor. C) The p-n junction allows current to flow in both directions. D) The p-n junction amplifies electrical signals. Show Answer Correct Answer: A) The p-n junction allows current to flow in one direction, acting as a rectifier. 2. The three leads of the transistor are: A) Emanator, Base, Collector. B) Emitter, Base, Collector. C) All the above. D) None of the above. Show Answer Correct Answer: B) Emitter, Base, Collector. 3. What are n-type semiconductors? A) Semiconductors that have been doped with elements that provide extra electrons. B) Semiconductors that have been doped with elements that create holes. C) Semiconductors that are pure and have no doping. D) Semiconductors that conduct electricity only at high temperatures. Show Answer Correct Answer: A) Semiconductors that have been doped with elements that provide extra electrons. 4. What is a key application of compound semiconductors like GaAs? A) Optoelectronics. B) Insulation. C) Power generation. D) Thermal management. Show Answer Correct Answer: A) Optoelectronics. 5. What is the range of energy levels that an electron can occupy in a material? A) Valence band. B) Conduction band. C) Resistivity. D) Forbidden band gap. Show Answer Correct Answer: A) Valence band. 6. What role does semiconductor physics play in the development of modern electronic devices? A) Crucial Role. B) Supporting Role. C) No Role. D) Minor Role. Show Answer Correct Answer: A) Crucial Role. 7. A simple diode rectifier circuit can convert:I. AC voltage to DC voltage II. DC voltage to AC voltage III. Small AC voltage to a large AC voltage A) I only. B) II only. C) III only. D) I and II only. E) I and III only. Show Answer Correct Answer: A) I only. 8. How does temperature affect the conductivity of N-type and P-type semiconductors? A) Temperature decreases conductivity in N-type semiconductors only. B) Temperature increases conductivity in both N-type and P-type semiconductors. C) Higher temperatures reduce conductivity in both types of semiconductors. D) Temperature has no effect on the conductivity of P-type semiconductors. Show Answer Correct Answer: B) Temperature increases conductivity in both N-type and P-type semiconductors. 9. What is the main advantage of semiconductor devices over vacuum tubes? A) Smaller Size and Weight. B) Lower Noise Level. C) Higher Power Handling. D) Longer Life Span. Show Answer Correct Answer: A) Smaller Size and Weight. 10. Explain the term 'breakdown voltage' in the context of diodes. A) Breakdown voltage is the voltage at which a diode becomes permanently damaged. B) Breakdown voltage refers to the voltage at which a diode stops conducting. C) Breakdown voltage is the maximum forward voltage a diode can handle. D) Breakdown voltage is the reverse voltage at which a diode begins to conduct significantly in reverse. Show Answer Correct Answer: D) Breakdown voltage is the reverse voltage at which a diode begins to conduct significantly in reverse. 11. Diode has polarity A) Anode and cathode. B) On and off. C) Output and input. D) None of the above. Show Answer Correct Answer: A) Anode and cathode. 12. What happens to the resistance of semiconductors as the temperature increases? A) Becomes Zero. B) Remains Constant. C) Increases. D) Decreases. Show Answer Correct Answer: D) Decreases. 13. ..... is a process that uses light to transfer a pattern onto a substrate, such as a silicon wafer, to create integrated circuits, microprocessors, and printed circuit boards A) Electroplating. B) Photolithography. C) Etching. D) Sputtering. Show Answer Correct Answer: B) Photolithography. 14. How many terminals are there in a transistor ..... ? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: C) 3. 15. In a Transistor ..... A) I$_{E}$ = I$_{C}$ + I$_{B}$. B) I$_{C}$ = I$_{E}$ + I$_{B}$. C) I$_{E}$ = I$_{C}$-I$_{B}$. D) I$_{B}$ = I$_{C}$ + I$_{E}$. Show Answer Correct Answer: A) I$_{E}$ = I$_{C}$ + I$_{B}$. 16. Doping is a process of adding a certain amount of specific impurities to semiconductor. What is the purpose of doping? A) To increase the resistance of semiconductor. B) To increase the thermal energy of semiconductor. C) To increase the temperature of the semiconductor. D) To increase the conductivity of the semiconductor. Show Answer Correct Answer: D) To increase the conductivity of the semiconductor. 17. How does a forward-biased PN junction behave? A) Voltage flows through the junction. B) No current flows through the junction. C) Current flows through the junction. D) The junction becomes an insulator. Show Answer Correct Answer: C) Current flows through the junction. 18. In a forward biased PN junction or diode, the negative voltage source is connected to the ..... material. A) N-type. B) P-type. C) Either N-type or P-type. D) Insulating. Show Answer Correct Answer: A) N-type. 19. What is doping in semiconductors? A) The process of adding impurities to a semiconductor to change its electrical properties. B) The method of cooling semiconductors to improve conductivity. C) The technique of layering different semiconductor materials for better performance. D) The process of removing impurities from a semiconductor to enhance its purity. Show Answer Correct Answer: A) The process of adding impurities to a semiconductor to change its electrical properties. 20. How does the doping process affect the electrical properties of a semiconductor? A) Doping changes the number of charge carriers in a semiconductor, affecting its electrical conductivity. B) Doping has no effect on the electrical properties of a semiconductor. C) Doping decreases the resistance of a semiconductor. D) Doping increases the mechanical strength of a semiconductor. Show Answer Correct Answer: A) Doping changes the number of charge carriers in a semiconductor, affecting its electrical conductivity. 21. What is the I-V characteristic curve of a diode? A) The I-V curve of a diode is a straight line regardless of voltage. B) The I-V characteristic curve of a diode shows a steep rise in current after a threshold voltage in forward bias and a small reverse current until breakdown in reverse bias. C) The I-V characteristic curve shows no current flow in either direction. D) Diodes conduct current equally in both forward and reverse bias. Show Answer Correct Answer: B) The I-V characteristic curve of a diode shows a steep rise in current after a threshold voltage in forward bias and a small reverse current until breakdown in reverse bias. 22. What are the main types of diodes? A) Capacitor Diodes. B) Standard Diodes, Zener Diodes, Schottky Diodes, Light Emitting Diodes (LEDs), Photodiodes, Varactor Diodes, Tunnel Diodes. C) Inductor Diodes. D) Rectifier Diodes. Show Answer Correct Answer: B) Standard Diodes, Zener Diodes, Schottky Diodes, Light Emitting Diodes (LEDs), Photodiodes, Varactor Diodes, Tunnel Diodes. 23. Explain the difference between intrinsic and extrinsic semiconductors. A) Intrinsic semiconductors are pure materials, while extrinsic semiconductors are doped with impurities to enhance conductivity. B) Intrinsic semiconductors are always doped with impurities. C) Extrinsic semiconductors are pure materials with no impurities. D) Both intrinsic and extrinsic semiconductors have the same conductivity properties. Show Answer Correct Answer: A) Intrinsic semiconductors are pure materials, while extrinsic semiconductors are doped with impurities to enhance conductivity. 24. What is the conductivity of semiconductors when impurities are added? A) Decreases. B) Remains Constant. C) Increases. D) Becomes Zero. Show Answer Correct Answer: C) Increases. 25. How do diodes protect circuits from voltage spikes? A) Diodes protect circuits from voltage spikes by redirecting excess voltage away from sensitive components. B) Diodes convert voltage spikes into heat to protect components. C) Diodes amplify voltage spikes to enhance circuit performance. D) Diodes store excess voltage for later use in the circuit. Show Answer Correct Answer: A) Diodes protect circuits from voltage spikes by redirecting excess voltage away from sensitive components. ← 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 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