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