Question

A p-n-p transistor based circuit is shown in the figure below with dual DC supply voltages. The value of $|V_{BE}|$ = 0.7 V and the collector voltage of the transistor is $V_C=0.V$. If the transistor in active region, then the value of supply voltage $V_{EE}$ is equal to ________ V.

• A. -12
• B. 14
• C. 10
• D. -10

Answer 1

The correct option is D -10

In a BJT, $I_C+I_B=I_E$

$\therefore I_C=I_E-I_B$

$=10.1-0.1=10mA$

Given that, $V_C=0V$
By applying KVL, we get,

$V_C+I_C\times 1\times {10}^3+V_{EE}=0$

$\therefore V_{EE}=-10\times {10}^{-3}\times 1\times {10}^3$

$=-10V$