These devices can be simulated with op-amps because they are difficult to fit on integrated circuits.  Their voltage drop leads the input AC voltage by ninety degrees, and the
These devices can be simulated with op-amps because they are difficult to fit on integrated circuits.  Their voltage drop leads the input AC voltage by ninety degrees, and these devices can be tuned using ferrite cores.  Their addition in series or parallel is non-trivial because of their magnetic coupling, and their behavior is governed by Lenz's law and (*) Faraday's Law.  They are typically solenoidal, and they store energy in a magnetic field by opposing a change in current.  For 10 points, name these circuit elements whose namesake property is measured in Henries, the opposite of capacitors.
These devices can be simulated with op-amps because they are difficult to fit on integrated circuits.  
{Inductor} [prompt on "coils" or "chokes" or any such nonsense]