Semiconductor Diode Quiz-MCQ

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Basic electronics

Semiconductor Diode (PN junction)

pn junction diode

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1. A semiconductor has generally ……………… valence electrons.

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2. A semiconductor has ………… temperature coefficient of resistance.

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3.  A reverse biased pn junction has resistance of the order of

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4. A reverse bias pn junction has …………

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5.  In a semiconductor, current conduction is due to ……..

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6. The forward voltage drop across a silicon diode is about

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7. At absolute temperature, an intrinsic semiconductor has ……….

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8. A pentavalent impurity has ………. Valence electrons

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9. A trivalent impurity has ….. valence electrons

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10. In an intrinsic semiconductor, the number of free electrons ………

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11. The leakage current across a pn junction is due to …………..

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12.  The leakage current in a pn junction is of the order of

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13. What is the dc output voltage of an unfiltered half wave rectifier whose peak output voltage 9.8v

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14. Under normal conditions a diode conducts current when it is ……………

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15. A hole in a semiconductor is defined as …………….

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16. A forward biased pn junction diode has a resistance of the order of

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17.  When a pure semiconductor is heated, its resistance …………..

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18. At room temperature, an intrinsic silicon crystal acts approximately as ……

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19. With forward bias to a pn junction , the width of depletion layer ………

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20. The addition of trivalent impurity to a semiconductor creates many ……..

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21. in n-type semiconductors the minority current carriers are

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22.  A semiconductor is formed by ……… bonds.

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23. To a first approximation of a forward-biased diode is treated like a

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24. The most commonly used semiconductor is

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25. A PN junction acts as a ……….

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