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


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B.Between 10-6 to 102 ohm-metre

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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


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C.Gallium arsenide

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48. Which of the following is an active device?


   A.Electric bulb

   B.Transformer

   C.SCR

   D.Loudspeaker


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C.SCR

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49. Which of the following is a passive component?


   A.Vacumm tube devices

   B.Capacitors

   C.Semiconductor devices

   D.All of the above


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B.Capacitors

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


   A.1.65

   B.1.45

   C.1.21

   D.1.00


✔ View Answer


C.1.21

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