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