Question

In the circuit given below, neglecting base emitter voltage $V_{BE}$, find the collector current.

• A. $0.78mA$
• B. $0.96mA$
• C. $1.28mA$
• D. $2.20mA$

Answer 1

The correct option is C $1.28mA$

$\beta =\frac{i_C}{i_B}=80\Rightarrow i_C=80i_B$
Also, $i_B{R}_B=8V$ (Since $V_{BE}=0$)
$i_B=\frac{8}{500\times {10}^3}$
$i_B=16\mu A$
$\Rightarrow i_C=80\times 16\times {10}^{-6}$
$\Rightarrow i_C=1.28mA$