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