For unity-gain summing amplifier with 3 inputs V1, V2, and V3 the output will be (Op-Amp) | Basic Electronics MCQ#63

For unity-gain summing amplifier with 3 inputs V1, V2, and V3 the output will be:

1. V1 + V2 + V3
2. – (V1 + V2 + V3)
3. 2(V1 + V2 + V3)
4. 3(V1 + V2 + V3)

Correct answer: 2. – (V1 + V2 + V3)