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: Semiconductor diode (PN junction) Which type of diode is work as a Variable Capacitor? Varactor Diode Tunnel Diode Photo diode LED 2 / 33 Category: Semiconductor diode (PN junction) What is the work of a Zener Diode ? constant current, Varied voltage Varied current, Varied Voltage Constant current, constant voltage Varied current, Constant voltage 3 / 33 Category: Semiconductor Physics The width of depletion layer in Reverse bias Constant Decrease Increase 4 / 33 Category: Semiconductor Physics Which type of charge on P-type material Neutral Positive None of these Negative 5 / 33 Category: Semiconductor Physics Resistance in a diode in Forward bias is Zero High Very high Low 6 / 33 Category: DC power supply allows DC but it blocks AC Conductor None Inductor Insulator 7 / 33 Category: Semiconductor Physics The conductivity of a semiconductor ………..by adding impurity None Decrease Increase Both 8 / 33 Category: Semiconductor Physics A semiconductor is formed by……….. Bonds Co-ordinate Covalent Electrovalent Ionic 9 / 33 Category: Semiconductor diode (PN junction) Ripple frequency of a half-wave rectifier is 4 times of input Double of input Half of input Equal to input Hint ( For Ge energy band gap is 0.72eV) 10 / 33 Category: Semiconductor Physics The energy band gap in silicon is..... 0.72eV 0.3eV 1.72eV 1.12eV 11 / 33 Category: Semiconductor Physics When a Pentavalent impurity is added to a pure semiconductor, it becomes P-type semiconductor An insulator N-type semiconductor An intrinsic semiconductor 12 / 33 Category: Semiconductor Physics How many diodes in the Center-tap Full wave rectifier 2 6 4 1 13 / 33 Category: DC power supply Input frequency of a 3-phase half wave rectifier is 50hz, then output frequency is 50hz 150hz 300hz 25hz 14 / 33 Category: Semiconductor Physics Which is impurity for an N-type material Boron Antimony Silicon Gallium 15 / 33 Category: Semiconductor Physics A semiconductor has ……….Temperature Coefficient of resistance None Negative Zero Positive Negative Coefficient Means When increasing the temperature then the resistance will decrease 16 / 33 Category: Semiconductor Physics What is the breakdown voltage of LED? 5.0V- 7.5V 1.7V- 3.0V 0.1V-0.3V 10.2V- 20.5V 17 / 33 Category: DC power supply The AC component present in output voltage is called Non-linear regulators Switching regulator Ripple None 18 / 33 Category: Semiconductor Physics Most commonly used Rectifier is Half wave rectifier Center-tap full wave rectifier Full wave bridge rectifier 19 / 33 Category: Semiconductor Physics Which of the following is not an active component DIODE RESISTOR SCR TRANSISTOR 20 / 33 Category: Semiconductor Physics Energy gap of a non-conductor is very small and vacant Very large and vacant none of these Complete overlapped Hint Hint (Indium, Boron, and Gallium have 3) Arsenic Bismuth and phosphorus have 5) 21 / 33 Category: Semiconductor Physics Which of the following is Impurity material of valency 3 Phosphorus Bismuth Boron Arsenic 22 / 33 Category: Semiconductor Physics As the doping to a pure semiconductor increases, the bulk resistance of the semiconductor None of the above Remains the same Increases Decreases 23 / 33 Category: Semiconductor Physics How many valance electrons are in a Pentavalent impurity? 4 3 6 5 24 / 33 Category: Semiconductor Physics Reverse Breakdown voltage that is Fixed already in the diode Zener breakdown Avalanche breakdown A and B 25 / 33 Category: Semiconductor Physics Which are responsible of Current flow in a semiconductor Only free electron both only holes Holes and free electrons 26 / 33 Category: Semiconductor Physics Atomic no of Germanium 32 14 16 29 27 / 33 Category: Semiconductor Physics Semiconductors in pure forms known as Intrinsic Extrinsic 28 / 33 Category: Semiconductor Physics Majority carrier in N-type material Electron Holes Both A and B 29 / 33 Category: Semiconductor Physics How many junctions is in a diode both 2 3 30 / 33 Category: DC power supply The output obtained by the rectifier is None Non-pulsating AC Pulsating AC Pulsating DC 31 / 33 Category: Semiconductor diode (PN junction) Output frequency of a full wave rectifier is 50 Hz, What is input frequency 100hz 200hz 25hz 50hz 32 / 33 Category: Semiconductor Physics Valance electron in a semiconductor 6 8 4 2 Hint (formula 0.45xVrms=0.45x 24= 10.8) 33 / 33 Category: DC power supply A half-wave rectifier is connected with input of 24V 50hz AC, What is Output DC voltage? 9.9v 12v 5.4v 10.8v Your score isThe average score is 36% 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
