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