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