AviationTire Instrumentation Powerplant And System Monitoring Instruments Remote (signal) Transmission System Q 3 / 3

A stator is:

Three fixed coils 60° apart and made up of electrically non-conducting material
Three fixed coils 120° apart and made up of electrically non-conducting material
Three fixed coils 60° apart and made up of electrically conducting material
Three fixed coils 120° apart and made up of electrically conducting material