Single-Coil Pickup
Identified by their single set of poles and single coil of winding.
Humbucker Pickup
Identified by their double set of poles and double coil of winding.
P-90 Pickup
Identified by their single set of poles and double coil of winding.
Active Pickup
Identified by their use of an external power source.
References
Sweetwater. (2023, December 19). Guitar Pickup Types Explained. InSync.
https://www.sweetwater.com/insync/guitar-pickup-types-explained/