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For a transistor , alpha(dc) and beta(d...

For a transistor , `alpha_(dc)` and `beta_(dc)` are the current ratios, then the value of `(beta_(dc) - alpha_(dc))/(alpha_(dc) . beta_(dc))`

A

1

B

1.5

C

2

D

2.5

Text Solution

Verified by Experts

The correct Answer is:
A
`beta_(dc)=(alpha_(dc))/(1-alpha_(dc)) rArr (1-alpha_(dc))=(alpha_(dc))/(beta_(dc))`
`(beta_(dc)-alphadc)/(alpha_(dc).beta_(dc))=(beta_(dc)(1-(alpha_(dc))/(beta_(dc))))/(alpha_(dc).beta_(dc))`
`=(1-(alpha_(dc))/(beta_(dc))/(alpha_(dc))`
`=(1-1+alpha_(dc))/(alpha_(dc))=1`
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