Question

The current gain of a transistor in a Common base arrangement is $0.98$. The Change in collector current corresponding to a change of $5mA$ in emitter current is :

• A. $0.1mA$
• B. $0.2mA$
• C. $4.9mA$
• D. $9.2mA$

Answer 1

Answer: (C)

$4.9mA$

$\alpha =\frac{\Delta i_c}{\Delta i_e}$

Given, $\alpha =0.98,\Delta i_e=5mA$

$\Delta i_c=\left(\alpha \right)\left(\Delta i_e\right)=\left(0.98\right)\left(5mA\right)$

$=4.9mA$