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 Share thisMCQ on Semiconductor physics 0% 0 votes, 0 avg Created on September 15, 2022Basic electronics Semiconductor diode/Semiconductor physics 1 / 33 Category: Semiconductor Physics 1. Valance electron in a semiconductor 8 2 6 4 2 / 33 Category: DC power supply 2. allows DC but it blocks AC None Conductor Insulator Inductor 3 / 33 Category: Semiconductor Physics 3. Most commonly used Rectifier is Full wave bridge rectifier Center-tap full wave rectifier Half wave rectifier 4 / 33 Category: Semiconductor Physics 4. How many junctions is in a diode 3 both 2 Hint ( For Ge energy band gap is 0.72eV) 5 / 33 Category: Semiconductor Physics 5. The energy band gap in silicon is..... 1.12eV 0.72eV 1.72eV 0.3eV 6 / 33 Category: Semiconductor Physics 6. Atomic no of Germanium 14 16 32 29 7 / 33 Category: Semiconductor Physics 7. Resistance in a diode in Forward bias is High Zero Very high Low 8 / 33 Category: Semiconductor Physics 8. Which are responsible of Current flow in a semiconductor both Only free electron only holes Holes and free electrons Hint (formula 0.45xVrms=0.45x 24= 10.8) 9 / 33 Category: DC power supply 9. A half-wave rectifier is connected with input of 24V 50hz AC, What is Output DC voltage? 12v 10.8v 5.4v 9.9v 10 / 33 Category: Semiconductor diode (PN junction) 10. What is the work of a Zener Diode ? constant current, Varied voltage Varied current, Constant voltage Varied current, Varied Voltage Constant current, constant voltage 11 / 33 Category: Semiconductor diode (PN junction) 11. Ripple frequency of a half-wave rectifier is Double of input 4 times of input Equal to input Half of input 12 / 33 Category: DC power supply 12. Input frequency of a 3-phase half wave rectifier is 50hz, then output frequency is 300hz 50hz 25hz 150hz 13 / 33 Category: Semiconductor diode (PN junction) 13. Which type of diode is work as a Variable Capacitor? Tunnel Diode Varactor Diode Photo diode LED 14 / 33 Category: Semiconductor Physics 14. Reverse Breakdown voltage that is Fixed already in the diode A and B Zener breakdown Avalanche breakdown 15 / 33 Category: Semiconductor Physics 15. As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor Decreases Increases Remains the same None of the above 16 / 33 Category: Semiconductor Physics 16. Which of the following is not an active component RESISTOR SCR DIODE TRANSISTOR 17 / 33 Category: DC power supply 17. The output obtained by the rectifier is Pulsating AC Pulsating DC None Non-pulsating AC 18 / 33 Category: Semiconductor Physics 18. What is the breakdown voltage of LED? 0.1V-0.3V 5.0V- 7.5V 1.7V- 3.0V 10.2V- 20.5V 19 / 33 Category: Semiconductor Physics 19. How many diodes in the Center-tap Full wave rectifier 6 1 4 2 20 / 33 Category: Semiconductor Physics 20. Which is impurity for an N-type material Boron Antimony Silicon Gallium 21 / 33 Category: Semiconductor Physics 21. A semiconductor has ……….Temperature Coefficient of resistance Positive Negative Zero None Negative Coefficient Means When increasing the temperature then the resistance will decrease 22 / 33 Category: Semiconductor Physics 22. When a Pentavalent impurity is added to a pure semiconductor, it becomes P-type semiconductor N-type semiconductor An insulator An intrinsic semiconductor 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 Bismuth Phosphorus Arsenic Boron 24 / 33 Category: Semiconductor Physics 24. Majority carrier in N-type material Both A and B Electron Holes 25 / 33 Category: Semiconductor diode (PN junction) 25. Output frequency of a full wave rectifier is 50 Hz, What is input frequency 25hz 100hz 50hz 200hz 26 / 33 Category: Semiconductor Physics 26. The width of depletion layer in Reverse bias Constant Decrease Increase 27 / 33 Category: Semiconductor Physics 27. Energy gap of a non-conductor is very small and vacant none of these Complete overlapped Very large and vacant 28 / 33 Category: Semiconductor Physics 28. Semiconductors in pure forms known as Extrinsic Intrinsic 29 / 33 Category: Semiconductor Physics 29. The conductivity of a semiconductor ………..by adding impurity Increase Decrease Both None 30 / 33 Category: Semiconductor Physics 30. A semiconductor is formed by……….. Bonds Electrovalent Covalent Ionic Co-ordinate 31 / 33 Category: Semiconductor Physics 31. Which type of charge on P-type material Negative Neutral Positive None of these 32 / 33 Category: DC power supply 32. The AC component present in output voltage is called Switching regulator Ripple None Non-linear regulators 33 / 33 Category: Semiconductor Physics 33. How many valance electrons are in a Pentavalent impurity? 3 5 4 6 Your score isThe average score is 24% LinkedIn Facebook Twitter 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) Share this