Final answer:
The study of cores on a regular repeated array is referred to as magnetic rope memory, which was a data storage device used in computers. Individual wires passing through iron cores represented bits of information.
Step-by-step explanation:
In the context of the question, the study of cores on a regular repeated array refers to the concept of magnetic rope memory. Magnetic rope memory was a data storage device used in early computers, where individual wires passed through iron cores to represent bits of information. The presence or absence of a wire passing through a core determined whether a one or a zero was stored.