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