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