Electromagnetic induction occurs when there is a changing magnetic flux, leading to the creation of an induced electric field. Even in a vacuum, this electric field can exist, but it does not produce an electromotive force (emf) if there is no resistance. While no current flows in a non-resistive object, the presence of an induced electric field can influence free electrons in a conductor placed within that field. The induced electric field behaves similarly to an emf from a battery, but without resistance, no current will flow. Understanding these principles clarifies the relationship between changing magnetic fields and induced electric fields in conductive materials.
