The current gain of a BJT is
A
$${{\text{g}}_{\text{m}}}{\text{ }}{{\text{r}}_{\text{o}}}$$
B
$$\frac{{{{\text{g}}_{\text{m}}}}}{{{{\text{r}}_{\text{o}}}}}$$
C
$${{\text{g}}_{\text{m}}}{\text{ }}{{\text{r}}_\pi }$$
D
$$\frac{{{{\text{g}}_{\text{m}}}}}{{{{\text{r}}_\pi }}}$$
Correct Answer: $${{\text{g}}_{\text{m}}}{\text{ }}{{\text{r}}_\pi }$$
