Final answer:
The subject of the question is an inductor, which is responsible for generating an oscillating current in an LC circuit.
Step-by-step explanation:
The subject of the question is an inductor. An LC circuit consists of an inductor and a capacitor connected in series or parallel. In this case, the circuit has 60 pulses per 60Hz current, indicating that it is oscillating at the same frequency as the current source. The inductor in the circuit is responsible for storing energy in the form of a magnetic field and generating an oscillating current.