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