Question

The open loop voltage gain in an opamp

• A. reduces if voltage across the inverting and non inverting terminal are same
• B. reduces if voltage across the inverting terminal is zero
• C. increases if voltage across the inverting and non inverting terminal are same
• D. remains the same, if voltage across any of these terminals are changed

Answer 1

The correct option is C increases if voltage across the inverting and non inverting terminal are same

Open loop voltage gain is given by $A_v=\frac{V_0}{V_{+}-V_{-}}$. If $V_{+}=V_{-}$, Voltage gain becomes infinity or very high. thus voltage gain increases