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Q.

Mark the wrong statement in the following regarding  intrinsic  semi conductor

1)   Under the action of applied electric field  holes move towards positive potential   

2)  The total  current in an intrinsic semi conductor   is  I=Ie+Ih  , Ie=current  due  toelectron Ih=Hole  current

3)The process of generation of  conduction  electrons and holes, and the process of recombination  of holes  and electron takes place simultaneously  4) Carbon, Silicon  and Germanium are intrinsic  semi conductors

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a

2, 3

b

1,2, 3 

c

1,2,3,4

d

1, 4

answer is C.

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Detailed Solution

1is wrong because under the action of applied electric field,  holes move towards negative potential

4 is wrong because carbon is an insulator , silicon, germanium are intrinsic  semiconductor

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