# Op Amp Practice

**Practice question for ECE201: "Linear circuit analysis I" **

By: Chinar Dhamija

Topic: Op Amp

## Question

Find the output voltage, Vout.

### Answer

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} $

## Questions and comments

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