GATE 2023 IN – Question 62
In the circuit shown, assuming an ideal opamp, the value of the output voltage Vo = ____ V (rounded off to one decimal place).
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Correct answer: 1.9 to 2.1
Explanation
The equal 3R feedback resistors give $V_-=V_o/2=V_+$. Let $V_+=v$ and the adjacent three-R junction be w. KCL gives $w=(4v-1)/3$ at the input node and $3w=v+V_o=3v$ at the junction.
Thus w = v and v = 1 V. Output: **2.0 V**.