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