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