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  4. The current amplification factor α of a common base transistor and the current amplification factor β of a common emitter transistor are not related by

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Q. 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

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

As $\beta = \frac{\alpha}{1-\alpha}$,
so $\alpha = \frac{\beta}{1+\beta}$ and $\frac{1}{\alpha} = \frac{1}{\beta} +1$