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