Question

The potential difference between the input terminals of an op-amp can be treated as nearly zero if:

• A. The two supply voltages are balanced
• B. The output voltage is not saturated
• C. The op-amp used in a circuit has negative feedback
• D. There is a DC bias path from terminals to ground

Hint:

For virtual short (i.e., \(V_+ \approx V_-\)), negative feedback must be present.

Answer 1

The Correct Option is C

The concept of **virtual short** in op-amps implies that the voltage difference between the input terminals is nearly zero when:
- Negative feedback is applied,
- The op-amp operates in the linear region (not saturated).