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