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Operational Amplifiers - Technical MCQs

Q1:

The closed-loop voltage gain of an inverting amplifier equals:

A the ratio of the input resistance to the feedback resistance

B the open-loop voltage gain

C the feedback resistance divided by the input resistance

D the input resistance

ANS:C - the feedback resistance divided by the input resistance

Gain = -Rf/Ri for an inverting amplifier therefore C is the correct answer.