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