Question
What is the typical output impedance of an op-amp?
Answer Options
- A) Very low
- B) Very high
- C) 100 ohms
- D) 10,000 ohms
Correct Answer: A
Explanation
An operational amplifier (\text{op-amp}) is designed to be a highly versatile, nearly ideal building block for electronic circuits. Its output characteristics are engineered to allow it to drive a wide variety of load circuits without its voltage being significantly affected by the current draw.
Consequently, the typical output impedance of an ideal \text{op-amp} is very low (often less than 100 \Omega or even a few ohms in high-performance units). This low output impedance, combined with a high input impedance, makes the \text{op-amp} an excellent voltage buffer and ensures that it can provide voltage to the load without experiencing significant voltage drop or current limiting.
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