Op-amps possess

Op-amps possess

• A. High input bias current
• B. Low output impedance
• C. High quiescent current
• D. Susceptibility to temperature drift

Answer: (B)

Op-amps are designed to behave like a stiff voltage source when feedback is applied, which translates to a very low output impedance. This means the output voltage stays nearly constant even as the load current changes, so the amplifier can drive connected circuitry without the voltage sagging. Negative feedback amplifies the ability to hold the output steady by reducing the effective output impedance: the loop actively corrects any deviation, making the output look almost like an ideal voltage source with a tiny impedance. High input bias current would mean the input source is loaded, opposing the goal of a high input impedance at the input; op-amps are typically chosen for very high input impedance to minimize loading. High quiescent current would waste power and isn’t a defining feature—many op-amps are optimized for low quiescent current. Temperature drift can affect accuracy, but it’s a characteristic that designers try to minimize rather than a fundamental trait of all op-amps. So, the best description is that op-amps provide a very low output impedance, enabling accurate, stable voltage output under varying load.

Op-amps are designed to behave like a stiff voltage source when feedback is applied, which translates to a very low output impedance. This means the output voltage stays nearly constant even as the load current changes, so the amplifier can drive connected circuitry without the voltage sagging. Negative feedback amplifies the ability to hold the output steady by reducing the effective output impedance: the loop actively corrects any deviation, making the output look almost like an ideal voltage source with a tiny impedance.

High input bias current would mean the input source is loaded, opposing the goal of a high input impedance at the input; op-amps are typically chosen for very high input impedance to minimize loading. High quiescent current would waste power and isn’t a defining feature—many op-amps are optimized for low quiescent current. Temperature drift can affect accuracy, but it’s a characteristic that designers try to minimize rather than a fundamental trait of all op-amps.

So, the best description is that op-amps provide a very low output impedance, enabling accurate, stable voltage output under varying load.