Figure 1. The picture shows a transformer with five stars representing the dotted terminal. The primary coil is connected to an AC current source and the secondary to a load resistance.

From

Definition, Measurement and Calibration of Magnetic Field of Electromagnetic Wave – Correct the Defects of Maxwell’s Classical Electromagnetic Field Theory

Shuang-ren Zhao

International Journal of Physics. 2023, 11(3), 106-135 doi:10.12691/ijp-11-3-2