What is an operational amplifier?

What are the basic operational rules for op-amps?

What kind of things can be done with operational amplifiers?

What is the role of negative feedback in the use of operational amplifiers?

Compare the ideal operational amplifier to real circuits.

How does the 741 compare to an ideal op-amp?

Compare the inverting and non-inverting op-amp amplifiers.

What is a comparator? What are some of its applications?

What is a Schmitt trigger? What is it good for?