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 diode (PN junction) 1. Which type of diode is work as a Variable Capacitor? LED Tunnel Diode Varactor Diode Photo diode 2 / 33 Category: Semiconductor Physics 2. What is the breakdown voltage of LED? 10.2V- 20.5V 5.0V- 7.5V 0.1V-0.3V 1.7V- 3.0V 3 / 33 Category: Semiconductor Physics 3. Energy gap of a non-conductor is none of these very small and vacant Complete overlapped Very large and vacant 4 / 33 Category: Semiconductor Physics 4. Atomic no of Germanium 16 32 29 14 5 / 33 Category: Semiconductor Physics 5. When a Pentavalent impurity is added to a pure semiconductor, it becomes An intrinsic semiconductor An insulator N-type semiconductor P-type semiconductor 6 / 33 Category: Semiconductor Physics 6. Majority carrier in N-type material Electron Both A and B Holes 7 / 33 Category: Semiconductor Physics 7. Which is impurity for an N-type material Antimony Gallium Boron Silicon 8 / 33 Category: Semiconductor diode (PN junction) 8. What is the work of a Zener Diode ? constant current, Varied voltage Constant current, constant voltage Varied current, Constant voltage Varied current, Varied Voltage 9 / 33 Category: Semiconductor Physics 9. The width of depletion layer in Reverse bias Decrease Constant Increase 10 / 33 Category: Semiconductor Physics 10. Which are responsible of Current flow in a semiconductor both Holes and free electrons only holes Only free electron 11 / 33 Category: DC power supply 11. The output obtained by the rectifier is Non-pulsating AC None Pulsating AC Pulsating DC 12 / 33 Category: Semiconductor Physics 12. Valance electron in a semiconductor 4 2 6 8 Hint Hint (Indium, Boron, and Gallium have 3) Arsenic Bismuth and phosphorus have 5) 13 / 33 Category: Semiconductor Physics 13. Which of the following is Impurity material of valency 3 Arsenic Boron Bismuth Phosphorus 14 / 33 Category: Semiconductor Physics 14. How many junctions is in a diode 3 both 2 15 / 33 Category: Semiconductor Physics 15. A semiconductor is formed by……….. Bonds Co-ordinate Covalent Electrovalent Ionic 16 / 33 Category: Semiconductor Physics 16. Most commonly used Rectifier is Half wave rectifier Full wave bridge rectifier Center-tap full wave rectifier 17 / 33 Category: Semiconductor Physics 17. The conductivity of a semiconductor ………..by adding impurity Increase None Decrease Both 18 / 33 Category: DC power supply 18. The AC component present in output voltage is called Ripple Non-linear regulators None Switching regulator 19 / 33 Category: Semiconductor Physics 19. Which of the following is not an active component RESISTOR DIODE TRANSISTOR SCR Hint ( For Ge energy band gap is 0.72eV) 20 / 33 Category: Semiconductor Physics 20. The energy band gap in silicon is..... 0.3eV 1.72eV 0.72eV 1.12eV 21 / 33 Category: Semiconductor Physics 21. Reverse Breakdown voltage that is Fixed already in the diode Avalanche breakdown Zener breakdown A and B Hint (formula 0.45xVrms=0.45x 24= 10.8) 22 / 33 Category: DC power supply 22. A half-wave rectifier is connected with input of 24V 50hz AC, What is Output DC voltage? 10.8v 12v 5.4v 9.9v 23 / 33 Category: Semiconductor diode (PN junction) 23. Output frequency of a full wave rectifier is 50 Hz, What is input frequency 50hz 200hz 25hz 100hz 24 / 33 Category: DC power supply 24. Input frequency of a 3-phase half wave rectifier is 50hz, then output frequency is 300hz 50hz 25hz 150hz 25 / 33 Category: Semiconductor diode (PN junction) 25. Ripple frequency of a half-wave rectifier is Double of input 4 times of input Equal to input Half of input 26 / 33 Category: Semiconductor Physics 26. Which type of charge on P-type material None of these Neutral Positive Negative 27 / 33 Category: Semiconductor Physics 27. As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor Decreases Increases None of the above Remains the same 28 / 33 Category: Semiconductor Physics 28. Resistance in a diode in Forward bias is Zero High Low Very high 29 / 33 Category: DC power supply 29. allows DC but it blocks AC None Inductor Conductor Insulator 30 / 33 Category: Semiconductor Physics 30. How many valance electrons are in a Pentavalent impurity? 6 5 4 3 31 / 33 Category: Semiconductor Physics 31. A semiconductor has ……….Temperature Coefficient of resistance None Negative Zero Positive Negative Coefficient Means When increasing the temperature then the resistance will decrease 32 / 33 Category: Semiconductor Physics 32. How many diodes in the Center-tap Full wave rectifier 2 4 1 6 33 / 33 Category: Semiconductor Physics 33. Semiconductors in pure forms known as Extrinsic Intrinsic Your score isThe average score is 36% 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
