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Q.

The correct relation between  α (ratio of collector current to emitter current) and β  (ratio of collector current to base current) of a transistor is:

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a

β=α1+α

b

β=11−α

c

α=β1+β

d

α=β1−α

answer is C.

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Detailed Solution

ΔIE=ΔIC+ΔIB  ;  β=ΔICΔIB  ;  α=ΔICΔIE  ⇒ΔIEΔIC=ΔICΔIC+ΔIBΔIC ⇒1α=1+1β So,  β=α1−α (or) α=β1+β
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