Final answer:
Induced currents, or generation currents, are not substantially affected by externally applied electric fields because they are induced by changing magnetic fields in accordance with Faraday's law of electromagnetic induction.
Step-by-step explanation:
The generation currents are not substantially affected by externally applied electric fields because they are induced by changing magnetic fields rather than by electric fields. These currents are called induced currents and are primarily caused by Faraday's law of electromagnetic induction. When a magnetic field changes in strength or direction, it induces an electric field, which in turn causes charges to move within a conductor, creating the generation current.