For an ideal op-amp in negative feedback:

A V+ ≠ V−

B V+ = V− (virtual short) and input currents are zero

C Output is always saturated

D Gain is zero

✓ Correct Answer: Option B

Ideal op-amp with negative feedback: infinite gain → V+ = V−, infinite input impedance → I_in = 0.

💡 Why is B) the correct answer?

The correct answer to the question "For an ideal op-amp in negative feedback:" is Option B: V+ = V− (virtual short) and input currents are zero.

The other options — A) V+ ≠ V−, C) Output is always saturated, D) Gain is zero — are incorrect for this FE Exam Prep question. As explained above: Ideal op-amp with negative feedback: infinite gain → V+ = V−, infinite input impedance → I_in = 0.

📚 About This FE Exam Prep Practice Question

This 2-level FE Exam Prep question from the Circuits topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free FE Exam Prep practice test or use flashcards for spaced repetition review.

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For an ideal op-amp in negative feedback:

✓ Correct Answer: Option B

📚 About This FE Exam Prep Practice Question

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