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