# Op Amp Practice

Practice question for ECE201: "Linear circuit analysis I"

By: Chinar Dhamija

Topic: Op Amp

## Question

Find the output voltage, Vout.

First we know that $V_-$ = $V_+$
$V_-$ = 20V = $V_+$ The next step would be to do nodal analysis at the node where the two resistor wires intersect.
Let's call that node V+:
\begin{align} \frac{V_+ - 0}{11} + \frac{V_+ - Vout}{44} = & 0\\ \frac{20}{11} + \frac{20 - Vout}{44} = & 0\\ 80 + 20 - Vout = &0\\ Vout = 100V \end{align}