Iron, rather than copper, is used in the core of transformers because iron:
A)can withstand a higher temperature
B)has a greater resistivity
C)has a very high permeability
D)makes a good permanent magnet
E)insulates the primary from the secondary

Question

Quizplus · Accepted Answer

Iron has a very high permeability, which means it is able to be magnetized easily and allows for efficient transfer of energy between the primary and secondary coils in a transformer. Copper does not have this high permeability and would not be as efficient in this application.

Iron, Rather Than Copper, Is Used in the Core of Transformers