HomeElectronics Multiple choice question MCQ online testImportant Question- Answers of Semiconductor Physics Important Question- Answers of Semiconductor Physics Leave a Comment / Electronics Multiple choice question MCQ online test Spread the loveMCQ on Semiconductor physics 0% 0 votes, 0 avg Created on September 15, 2022Basic electronics Semiconductor diode/Semiconductor physics 1 / 33 Category: Semiconductor Physics 1. Which type of charge on P-type material Positive Negative Neutral None of these 2 / 33 Category: Semiconductor Physics 2. What is the breakdown voltage of LED? 5.0V- 7.5V 10.2V- 20.5V 0.1V-0.3V 1.7V- 3.0V 3 / 33 Category: Semiconductor Physics 3. How many valance electrons are in a Pentavalent impurity? 5 3 4 6 4 / 33 Category: Semiconductor Physics 4. Reverse Breakdown voltage that is Fixed already in the diode A and B Zener breakdown Avalanche breakdown 5 / 33 Category: Semiconductor Physics 5. As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor Remains the same None of the above Decreases Increases 6 / 33 Category: Semiconductor Physics 6. Resistance in a diode in Forward bias is Low Very high Zero High 7 / 33 Category: DC power supply 7. allows DC but it blocks AC Insulator Conductor None Inductor 8 / 33 Category: Semiconductor Physics 8. Valance electron in a semiconductor 4 8 6 2 9 / 33 Category: Semiconductor Physics 9. A semiconductor has ……….Temperature Coefficient of resistance Positive Zero Negative None Negative Coefficient Means When increasing the temperature then the resistance will decrease 10 / 33 Category: Semiconductor Physics 10. Which is impurity for an N-type material Gallium Boron Silicon Antimony 11 / 33 Category: Semiconductor Physics 11. When a Pentavalent impurity is added to a pure semiconductor, it becomes An insulator N-type semiconductor P-type semiconductor An intrinsic semiconductor Hint (formula 0.45xVrms=0.45x 24= 10.8) 12 / 33 Category: DC power supply 12. A half-wave rectifier is connected with input of 24V 50hz AC, What is Output DC voltage? 12v 5.4v 10.8v 9.9v 13 / 33 Category: Semiconductor diode (PN junction) 13. What is the work of a Zener Diode ? Varied current, Varied Voltage Constant current, constant voltage constant current, Varied voltage Varied current, Constant voltage 14 / 33 Category: Semiconductor Physics 14. How many diodes in the Center-tap Full wave rectifier 4 6 2 1 15 / 33 Category: Semiconductor Physics 15. Majority carrier in N-type material Electron Holes Both A and B 16 / 33 Category: Semiconductor Physics 16. A semiconductor is formed by……….. Bonds Co-ordinate Covalent Ionic Electrovalent 17 / 33 Category: Semiconductor Physics 17. Which are responsible of Current flow in a semiconductor Only free electron Holes and free electrons only holes both 18 / 33 Category: Semiconductor diode (PN junction) 18. Which type of diode is work as a Variable Capacitor? Tunnel Diode Photo diode Varactor Diode LED 19 / 33 Category: Semiconductor diode (PN junction) 19. Ripple frequency of a half-wave rectifier is Equal to input Half of input 4 times of input Double of input 20 / 33 Category: Semiconductor Physics 20. Which of the following is not an active component RESISTOR SCR DIODE TRANSISTOR 21 / 33 Category: DC power supply 21. The output obtained by the rectifier is None Non-pulsating AC Pulsating DC Pulsating AC 22 / 33 Category: Semiconductor Physics 22. The conductivity of a semiconductor ………..by adding impurity Decrease Both None Increase 23 / 33 Category: Semiconductor Physics 23. Atomic no of Germanium 14 29 32 16 Hint Hint (Indium, Boron, and Gallium have 3) Arsenic Bismuth and phosphorus have 5) 24 / 33 Category: Semiconductor Physics 24. Which of the following is Impurity material of valency 3 Boron Phosphorus Arsenic Bismuth 25 / 33 Category: Semiconductor diode (PN junction) 25. Output frequency of a full wave rectifier is 50 Hz, What is input frequency 25hz 100hz 200hz 50hz 26 / 33 Category: Semiconductor Physics 26. Semiconductors in pure forms known as Extrinsic Intrinsic Hint ( For Ge energy band gap is 0.72eV) 27 / 33 Category: Semiconductor Physics 27. The energy band gap in silicon is..... 1.72eV 0.72eV 0.3eV 1.12eV 28 / 33 Category: Semiconductor Physics 28. Energy gap of a non-conductor is Complete overlapped none of these Very large and vacant very small and vacant 29 / 33 Category: DC power supply 29. Input frequency of a 3-phase half wave rectifier is 50hz, then output frequency is 50hz 150hz 25hz 300hz 30 / 33 Category: Semiconductor Physics 30. How many junctions is in a diode 3 both 2 31 / 33 Category: DC power supply 31. The AC component present in output voltage is called None Switching regulator Ripple Non-linear regulators 32 / 33 Category: Semiconductor Physics 32. The width of depletion layer in Reverse bias Constant Decrease Increase 33 / 33 Category: Semiconductor Physics 33. Most commonly used Rectifier is Full wave bridge rectifier Half wave rectifier Center-tap full wave rectifier Your score isThe average score is 31% LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Also read Logic gates MCQ Quiz Zener Diode MCQ Quiz Concept of Logic Gates What is Impedance (Impedance vs Resistance) Spread the love
