FM modulation :
High Frequency at + amplidude of sign wave
low Frequency at - amplitude of sine wave
Increaseed Aplidude inc rease current
Increased Voltage is Increase difference in potenital.
FM carrier is rotated 90 degrees fro axis placing the Amplidude within the magnetic/Inductance field
Therefore the carrier of the FM modulation actually the induction amplidude (of the magnetic field.