Question: What is the primary function of a voltage follower using an op-amp?

Options:

1. To amplify the input voltage
2. To provide high input impedance and low output impedance
3. To invert the input signal
4. To filter high frequencies

Correct Answer: To provide high input impedance and low output impedance

Solution:

A voltage follower provides high input impedance and low output impedance, making it ideal for buffering signals.