railway RRB JE (CBT I + CBT II) Mock Test 2024 Electronic Mechanic Electronic Devices and Circuits Operational Amplifiers

Calculate the output voltage if R1 = R2 = R3 = 50 Ω, Rf = 1 kΩ, and V1 = V2 = V3 = 50 mV.

1
-3.0 V
2
3.0 V
3
1.0 V
4
-1.0
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