Semiconductor Diode Quiz-MCQ

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

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

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

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

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

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

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

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

9. A trivalent impurity has ….. valence electrons

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

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

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

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

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

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

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

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

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

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

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

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

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

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

24. The most commonly used semiconductor is

25. A PN junction acts as a ……….