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