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E7G12:What is an operational amplifier?

E7G12E7G

What is an operational amplifier?

Direct answer summary (2024-2028 NCVEC pool)

The official correct answer for E7G12 is A high-gain, direct-coupled differential amplifier with very high input impedance and very low output impedance.

The key fact is A high-gain, direct-coupled differential amplifier with very high input impedance and very low output impedance. Match that fact to the exact condition in the question; the other choices describe a different rule, band, component, or operating situation.

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