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