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