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