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ECE Objective Questions { Semiconductor Physics and Diodes }



50. A defect semiconductor
A. is another name for N-type semiconductors
B. is the one sufferign from some inherent defects
C. is one whose electrical properties depend upon the departure of the material form stoichometric structure
D. is one which has a deficiency of charge carriers

51. Semiconductor generation rate is a term
A. used in semiconductor industry indicating the number of semiconductors produced every day
B. used to indicated time rate of creation of electron-hole pairs in semiconductors
C. used to indicate rise in current in a semiconductor as the voltage is increased
D. none of these

52. Semiconductor junction is
A. a transition between two semiconducting regions
B. produced when a P-type material is joined to an N-type material or vice-versa
C. a region of transition between semiconducting regions of different electrical properties
D. none of these

53. A junction that is formed by adding controlled amount of an impurity to the melt during crystal growth is termed as
A. doped junction
B. alloy junction
C. fused junction
D. none of these

54. A junction which is produced by recrystallization on a base crystal from a liquid phase of one or more components and the semiconductor is called
A. doped junction
B. alloy junction
C. fused junction
D. none of these

55. A grown junction is the one which is formed
A. during growth of a crystal from a melt
B. by the addition of an impurity to the melt during crystal growth
C. by recrystallization technique
D. none of these

56. An N-N junction is a transition
A. between two semiconducting materials having different electrical properties
B. region between two regions having different propertiLs in N-type semiconducting material
C. between two semiconducting material having idential electrical properties
D. none of these

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