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