- #1

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## Homework Statement

The problem is gives an ideal op-amp and wants me to find the output current of it. Here is a picture of the problem.

http://i.imgur.com/NfO6q.png

## Homework Equations

vp=vn

in=ip=0

## The Attempt at a Solution

So what i did is take KCL at the Vn node...

(Vn-10)/5K + (Vn-Vout)/10K = 0

Since vp=0 then vn must equal zero

-10/5k-Vout/10k=0

So Vout=-20

But because it's out of the amplifiers range which is from -15 to 15 volts, then Vout is 15 volts. So I then do KCL at the final node to solve for iout...

(15-0)/10K + 15/10K = -iout

-3mA=iout

But the answer to the question is -3.167mA. Please help!