1.

For common emitter configuration, if alpha and beta have their usual meanings, the incorrect relationship between alpha and beta is :

Answer»

`(1)/(alpha)=(1)/(BETA)+1`
`alpha=(beta)/(1-beta)`
`alpha=(beta)/(1+beta)`
`alpha=(beta^(2))/(1+beta^(2))`

SOLUTION :`(B) alpha=(beta)/(1-beta) (D) alpha=(beta^(2))/(1+beta^(2))`
For transistor `I_(E )=I_(B)+I_(C )`
`THEREFORE (I_(B))/(I_(C ))=(I_(B))/(I_(C ))+1`
`therefore (1)/(alpha)=(1)/(beta)+1""`(Option (A) is correct)
`therefore (1)/(alpha)=(1+beta)/(beta)`
`therefore alpha=(beta)/(1+beta)""` (Option C is correct)
`therefore` Option (B) and (D) are not correct.


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