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. Valance electron in a semiconductor 4 8 6 2 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? 12v 10.8v 5.4v 9.9v 3 / 33 Category: Semiconductor Physics 3. When a Pentavalent impurity is added to a pure semiconductor, it becomes An intrinsic semiconductor P-type semiconductor N-type semiconductor An insulator 4 / 33 Category: Semiconductor diode (PN junction) 4. Output frequency of a full wave rectifier is 50 Hz, What is input frequency 200hz 25hz 100hz 50hz 5 / 33 Category: Semiconductor Physics 5. Which is impurity for an N-type material Boron Gallium Antimony Silicon Hint Hint (Indium, Boron, and Gallium have 3) Arsenic Bismuth and phosphorus have 5) 6 / 33 Category: Semiconductor Physics 6. Which of the following is Impurity material of valency 3 Arsenic Boron Bismuth Phosphorus 7 / 33 Category: Semiconductor Physics 7. Semiconductors in pure forms known as Intrinsic Extrinsic 8 / 33 Category: Semiconductor Physics 8. What is the breakdown voltage of LED? 10.2V- 20.5V 5.0V- 7.5V 1.7V- 3.0V 0.1V-0.3V 9 / 33 Category: DC power supply 9. The output obtained by the rectifier is None Non-pulsating AC Pulsating AC Pulsating DC 10 / 33 Category: Semiconductor Physics 10. A semiconductor has ……….Temperature Coefficient of resistance Negative None Positive Zero Negative Coefficient Means When increasing the temperature then the resistance will decrease 11 / 33 Category: Semiconductor diode (PN junction) 11. What is the work of a Zener Diode ? Varied current, Constant voltage Constant current, constant voltage constant current, Varied voltage Varied current, Varied Voltage 12 / 33 Category: Semiconductor Physics 12. Majority carrier in N-type material Holes Both A and B Electron 13 / 33 Category: Semiconductor diode (PN junction) 13. Ripple frequency of a half-wave rectifier is Half of input 4 times of input Equal to input Double of input 14 / 33 Category: DC power supply 14. Input frequency of a 3-phase half wave rectifier is 50hz, then output frequency is 50hz 150hz 300hz 25hz 15 / 33 Category: Semiconductor Physics 15. Atomic no of Germanium 29 32 14 16 16 / 33 Category: Semiconductor Physics 16. The conductivity of a semiconductor ………..by adding impurity Increase Decrease None Both 17 / 33 Category: Semiconductor Physics 17. As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor Increases None of the above Remains the same Decreases 18 / 33 Category: Semiconductor Physics 18. How many junctions is in a diode 3 both 2 19 / 33 Category: Semiconductor Physics 19. Which of the following is not an active component RESISTOR TRANSISTOR SCR DIODE 20 / 33 Category: Semiconductor Physics 20. How many valance electrons are in a Pentavalent impurity? 5 6 3 4 Hint ( For Ge energy band gap is 0.72eV) 21 / 33 Category: Semiconductor Physics 21. The energy band gap in silicon is..... 0.3eV 1.72eV 0.72eV 1.12eV 22 / 33 Category: Semiconductor diode (PN junction) 22. Which type of diode is work as a Variable Capacitor? Photo diode Tunnel Diode LED Varactor Diode 23 / 33 Category: Semiconductor Physics 23. Resistance in a diode in Forward bias is High Very high Zero Low 24 / 33 Category: DC power supply 24. allows DC but it blocks AC Insulator None Inductor Conductor 25 / 33 Category: Semiconductor Physics 25. How many diodes in the Center-tap Full wave rectifier 2 1 4 6 26 / 33 Category: Semiconductor Physics 26. A semiconductor is formed by……….. Bonds Co-ordinate Covalent Electrovalent Ionic 27 / 33 Category: Semiconductor Physics 27. Reverse Breakdown voltage that is Fixed already in the diode Zener breakdown Avalanche breakdown A and B 28 / 33 Category: Semiconductor Physics 28. The width of depletion layer in Reverse bias Decrease Constant Increase 29 / 33 Category: Semiconductor Physics 29. Which are responsible of Current flow in a semiconductor both Only free electron Holes and free electrons only holes 30 / 33 Category: Semiconductor Physics 30. Energy gap of a non-conductor is Very large and vacant very small and vacant Complete overlapped none of these 31 / 33 Category: Semiconductor Physics 31. Most commonly used Rectifier is Half wave rectifier Center-tap full wave rectifier Full wave bridge rectifier 32 / 33 Category: DC power supply 32. The AC component present in output voltage is called Non-linear regulators Switching regulator Ripple None 33 / 33 Category: Semiconductor Physics 33. Which type of charge on P-type material None of these Positive Negative Neutral Your score isThe average score is 36% 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
