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In a transistor if increase in emitter current is 4 mA and corresponding increase in collector current is 3.5 mA. Find β

a] .875

b] .5

c] 7

d]1

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IE=4

Ic=3.5

 α=IcIE=3.54=78

β=α1α=78178=7

Hence , option {C} is correct 

7

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