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