HomeElectronics Multiple choice question MCQ online testSemiconductor Diode Quiz-MCQ Semiconductor Diode Quiz-MCQ Leave a Comment / Electronics Multiple choice question MCQ online test Spread the love 0% 1 votes, 5 avg Created on September 03, 2022Basic electronics Semiconductor Diode (PN junction) 1 / 25 Category: Semiconductor diode (PN junction) 1. A semiconductor has generally ……………… valence electrons. 3 6 2 4 2 / 25 Category: Semiconductor diode (PN junction) 2. The leakage current in a pn junction is of the order of µA A kA mA 3 / 25 Category: Semiconductor diode (PN junction) 3. At room temperature, an intrinsic silicon crystal acts approximately as …… A piece of copper wire An insulator A conductor A battery 4 / 25 Category: Semiconductor diode (PN junction) 4. The forward voltage drop across a silicon diode is about 0.7 V 3 V 2.5 V 5 V 5 / 25 Category: Semiconductor diode (PN junction) 5. With forward bias to a pn junction , the width of depletion layer ……… Increases Remains the same None of the above Decreases 6 / 25 Category: Semiconductor diode (PN junction) 6. What is the dc output voltage of an unfiltered half wave rectifier whose peak output voltage 9.8v 9.8v 6.23v 3.1v 19.6v 7 / 25 Category: Semiconductor diode (PN junction) 7. In an intrinsic semiconductor, the number of free electrons ……… None of the above Is greater than the number of holes Is less than the number of holes Equals the number of holes 8 / 25 Category: Semiconductor diode (PN junction) 8. The most commonly used semiconductor is Carbon Silicon Sulphur Germanium 9 / 25 Category: Semiconductor diode (PN junction) 9. A semiconductor is formed by ……… bonds. Electrovalent Covalent None of the above Co-ordinate 10 / 25 Category: Semiconductor diode (PN junction) 10. A trivalent impurity has ….. valence electrons 3 4 6 5 11 / 25 Category: Semiconductor diode (PN junction) 11. At absolute temperature, an intrinsic semiconductor has ………. A few free electrons Many free electrons No holes or free electrons Many holes 12 / 25 Category: Semiconductor diode (PN junction) 12. A hole in a semiconductor is defined as ……………. A free proton A free neutron The incomplete part of an electron pair bond A free electron 13 / 25 Category: Semiconductor diode (PN junction) 13. Under normal conditions a diode conducts current when it is …………… reverse biased saturated avalanched forward biased 14 / 25 Category: Semiconductor diode (PN junction) 14. A PN junction acts as a ………. None of the above Unidirectional switch Bidirectional switch Controlled switch 15 / 25 Category: Semiconductor diode (PN junction) 15. A semiconductor has ………… temperature coefficient of resistance. Positive Negative None of the above Zero 16 / 25 Category: Semiconductor diode (PN junction) 16. When a pure semiconductor is heated, its resistance ………….. Goes down Goes up Can’t say Remains the same 17 / 25 Category: Semiconductor diode (PN junction) 17. A reverse biased pn junction has resistance of the order of KΩ MΩ Ω None of the above 18 / 25 Category: Semiconductor diode (PN junction) 18. A forward biased pn junction diode has a resistance of the order of KΩ None of these MΩ Ω 19 / 25 Category: Semiconductor diode (PN junction) 19. In a semiconductor, current conduction is due to …….. None of the above Only holes Holes and free electrons Only free electrons 20 / 25 Category: Semiconductor diode (PN junction) 20. To a first approximation of a forward-biased diode is treated like a Open switch with infinite resistance Lose switch in series with a small resistance and a battery Close switch in series with the battery voltage of 0.7v Closed switch with the voltage drop of zero volt 21 / 25 Category: Semiconductor diode (PN junction) 21. The addition of trivalent impurity to a semiconductor creates many …….. Free electrons Bound electrons Valence electrons Holes 22 / 25 Category: Semiconductor diode (PN junction) 22. A pentavalent impurity has ………. Valence electrons 5 6 4 3 23 / 25 Category: Semiconductor diode (PN junction) 23. The leakage current across a pn junction is due to ………….. Junction capacitance Minority carriers None of the above Majority carriers 24 / 25 Category: Semiconductor diode (PN junction) 24. A reverse bias pn junction has ………… Very low resistance Large current flow Almost no current Very narrow depletion layer 25 / 25 Category: Semiconductor diode (PN junction) 25. in n-type semiconductors the minority current carriers are The holes Valence electrons Protons Free electrons Your score is LinkedIn Facebook 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Transistor questions and answers Zener Diode MCQ with answers Logic gates MCQ Quiz Basic electronics MCQ question answer Semiconductor PN diode Spread the love
