In common emitter amplifier the $\frac{I_c}{I_e}$ is 0.98. The current gain will be
Answer & explanation
Correct answer: option 3
We know that for common base $α=\frac{i_c}{i_e}=\frac{collector\, current}{emitter\, current}=0.98$
and for common emitter $β=\frac{i_c}{i_b}=\frac{collector\, current}{base\, current}$
$β=\frac{α}{1-α}=\frac{0.98}{1-0.98}=\frac{0.98}{0.92}=49$