Semiconductor - Semiconductor objective questions and answers

46. The resistivity of a semiconductor lies

   A.Below 10^-6

   B.Between 10^-6 to 10² ohm-metre

   C.Between 10^-6 to 10⁴ ohm-metre

   D.Above 10⁴ ohm-metre

47. Which of the following materials can be used to make a light-emitting diode?

   A.Silicon

   B.Germanium

   C.Gallium arsenide

   D.Phosphorescent material

48. Which of the following is an active device?

   A.Electric bulb

   B.Transformer

   C.SCR

   D.Loudspeaker

49. Which of the following is a passive component?

   A.Vacumm tube devices

   B.Capacitors

   C.Semiconductor devices

   D.All of the above

50. For a half wave rectified sine wave the ripple factor is

   A.1.65

   B.1.45

   C.1.21

   D.1.00

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