Physics - Semiconductors Question with Solution | TestHub

The power gain ($A_p$) of a transistor is the product of its voltage gain ($A_v$) and current gain ($A_i$).

$A_p=A_v\times A_i$

The ratio of power gain to voltage gain is:

$\frac{A_p}{A_v}=A_i$

In a common emitter configuration, the current gain is the ratio of collector current to base current, which is denoted by $\beta$.

$\frac{A_p}{A_v}=\beta$

Answer: $\beta$