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