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