The current amplification factor `alpha` of a common base transistor and the current amplification factor `beta`of a common emitter transistor are not related by

Options

A. `alpha=(beta)/(1+beta)`
B. `beta=(alpha)/(1-beta)`
C. `(1)/(alpha)-(1)/(beta)=1`
D. `beta=(alpha)/(1+alpha)`

Answer

D

Explanation

As `beta=(alpha)/(1-alpha),` so `alpha=(beta)/(1+beta)` and `(1)/(alpha)=(1)/(beta)+1`