Figure 3. When the secondary coil moves to a place far away from the primary coil, in fact, the primary coil becomes a transmitting antenna and the secondary coil becomes a receiving antenna

From

Energy Flow and Photons from Primary Coil to Secondary Coil of Transformer

Shuang-ren Zhao

International Journal of Physics. 2023, 11(1), 24-39 doi:10.12691/ijp-11-1-4