Physics - Semiconductors Question with Solution | TestHub

The current gain $\beta$ of a transistor in common emitter configuration is defined as the ratio of the change in collector current to the change in base current.

$\beta =\frac{\Delta I_C}{\Delta I_B}$

Given $\beta =50$ and $\Delta I_C=350\mu \mathrm{A}$.

$\Delta I_B=\frac{\Delta I_C}{\beta }$

$\Delta I_B=\left(\frac{350}{50}\right)\mu \mathrm{A}$

Answer: $\left(\frac{350}{50}\right)\mu \mathrm{A}$