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