Question: What is the function of an operational amplifier (op-amp) in a feedback configuration?

Options:

1. To increase the input voltage
2. To stabilize the output voltage
3. To amplify the difference between two input voltages
4. To convert AC signals to DC

Correct Answer: To amplify the difference between two input voltages

Solution:

An op-amp amplifies the difference between its inverting and non-inverting inputs in a feedback configuration.