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