"If there is a change of electric (or changing magnetic field)It is found that the area around the magnetic field (or electric).Whether it's the air, the vacuum and insulation, "he said.
"If there is a change in the electric field (or the magnetic field) then. Will find that the area is the magnetic field (or fields) or whether the conductor insulation, air and vacuum it. "
"If there is a change of electric field (or magnetic variation) . Found around the area is the magnetic field (or electric) such as lead, insulation, air and vacuum, " .