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