Friday, 3 October 2014

ELECTRONICS MULTIPLE CHOICE QUESTIONS

1. To a germanium sample, traces of gallium are added as an impurity. The resultant sample would behave like .[AIIMS 2003]

2. The energy band gap is maximum in . [AIEEE 2002]

3. In a PN-junction diode not connected to any circuit . [IIT-JEE 1998]

4. Which of the following statements concerning the depletion zone of an unbiased PN junction is (are) true . [IIT-JEE 1995]

5. The output of OR gate is 1. [CBSE PMT 2004]

6. Zener breakdown in a semi-conductor diode occurs when . [UPSEAT 2002]

7. In a PN-junction . [CBSE PMT 2002]

8. Which of the following materials is non crystalline . [CBSE PMT 1993]

9. Biaxial crystal among the following is . [Pb. CET 1998]

10. When NPN transistor is used as an amplifier . [AIEEE 2004]
11. In a PN-junction . [CBSE PMT 2002]


12. A PN- junction has a thickness of the order of . [BIT 1990]

13. Bonding in a germanium crystal (semi- conductor) is . [CPMT 1986; MP P]

14. The energy band gap is maximum in . [AIEEE 2002]


15. For a crystal system, a = b = c, α = β = λ != 90⁰, the system is . [BHU 2000]


16. In extrinsic P and N-type, semiconductor materials, the ratio of the impurity atoms to the pure semiconductor atoms is about . [MP PET 2003]

17. On increasing the reverse bias to a large value in a PN-junction diode, current . [MP PMT 1994; BH]

18. When Ge crystals are doped with phosphorus atom, then it becomes . [AFMC 1995;]


19. In a semiconductor . [AIEEE 2002; AII]


20. In the middle of the depletion layer of a reverse-biased PN junction, the. [AIEEE 2003]



21. To a germanium sample, traces of gallium are added as an impurity. The resultant sample would behave like . [AIIMS 2003]


22. Biaxial crystal among the following is . [Pb. CET 1998]


23. In P-type semiconductor, there is . [MP PMT 1989]


24. Energy bands in solids are a consequence of . [DCE 1999, 2000;]


25. When NPN transistor is used as an amplifier . [AIEEE 2004]
26. Which of the following statements concerning the depletion zone of an unbiased PN junction is (are) true .[IIT-JEE 1995]

27. The emitter-base junction of a transistor is …… biased while the collector-base junction is ……. biased .[KCET 2004]

28. The nature of binding for a crystal with alternate and evenly spaced positive and negative ions is . [CBSE PMT 2000]


29. Which of the following materials is non crystalline . [CBSE PMT 1993]

30. Holes are charge carriers in . [IIT-JEE 1996]
31. A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be a correct statement . [IIT-JEE 1988;MP]

32. The coordination number of Cu is . [AMU 1992]

33. A piece of semiconductor is connected in series in an electric circuit. On increasing the temperature, the current in the circuit will. [RPMT 2003]

34. The difference in the variation of resistance with temperature in a metal and a semiconductor arises essentially due to the difference in the. [AIEEE 2003]


35. Zener breakdown in a semi-conductor diode occurs when . [UPSEAT 2002]

36. Boolean algebra is essentially based on . [AIIMS 1999]

37. PN-junction diode works as a insulator, if connected . [CPMT 1987]

38. Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added . [MP PET 1999]

39. The output of OR gate is 1. [CBSE PMT 2004]

40. The dominant mechanisms for motion of charge carriers in forward and reverse biased silicon P-N junctions are . [AIIMS 2000]

41. N-type semiconductors will be obtained, when germanium is doped with. [AIIMS 2000]