Question

In a common base transistor circuit, the current gain is 0.98. The current gain of common emitter transistor circuit is

Answer 1

hello sara, take a look at the solution given above

Answer 2

Answer:

The current gain of common emitter transistor circuit is 49.

Explanation:

$I_C= Collector current \\I_B= Base current\\I_E= Emitter current\\I_C=I_B+I_E$

In a common base transistor(CB), current gain=

$\beta=\frac{\Delta \mathrm{I}_{\mathrm{C}}}{\Delta \mathrm{I}_{\mathrm{B}}}=0.98$

The current gain of the common emitter transistor,

$\begin{aligned}&\alpha=\frac{\Delta \mathrm{I}_{\mathrm{C}}}{\Delta \mathrm{I}_{\mathrm{E}}} \\&\alpha=\frac{\beta}{1-\beta} \\&\alpha=\frac{0.98}{1-0.98}=49 \\&\alpha=49\end{aligned}$

The current gain of common emitter transistor circuit is 49.