Question

Two identical transistors shown in below figure have $\beta =100$. Then the output voltage $\left(V_0\right)$ is

• A. 10.75 V
• B. 9.75 V
• C. 11.25 V
• D. 12.25 V

Answer 1

The correct option is C 11.25 V



$ApplyKVLintheloop\left(L_1\right)showninfigure$
$-4+0.7+8i-0.7=0$
$8i=4$
$I=0.5mA$
$\therefore I_{E2}=1mA-0.5mA$
$=0.5mA$
$As,I_{C2}=I_{E2}$
$\therefore V_0=15-7.5\times 0.5$
$=15-7.5\times 0.5$
$V_0=11.25volt$