Question

Consider the circuit shown in the figure below

Then, the value of output voltage $V_0$ is equal to ____ V

• A. 15

Answer 1

The correct option is A 15

Applying virtual ground concept, we have $V_1=V_A=5V$

$\because$Current does not flow in the $6k\Omega$ branch,

$V_C=5V$

Thus, $V_0=\left(\frac{8+4}{4}\right)\times V_C=1\times 5=15V$