Question

The relation between α and β is_________

(a) β = α/ (1-α)

(b) α = β/(1+β)

(c) β = α/ (1+α)

(d) α = β/(1- β)

The question was asked in a job interview.

The query is from The Common Emitter Configuration topic in portion Transistor Characteristics of Electronic Devices & Circuits

Answer 1

The correct option is (b) α = β/(1+β)

Easiest explanation: β is an ac base amplification factor. α is called as current amplification factor. The relation of IC and IB change as IC= βIB+ (1+ β) ICBO.