toroidal and cylindrical inductor on circuit board of computer mainboard detail

black board capacitor chip choke circuit closeup coil component computer copper core cylinder design detail device disassembled electric electrical electromagnetic electronic electronics electrotechnical electrotechnology engineering ferrite ferromagnetic field hardware impedance inductance induction inductor inductors industrial industry integrated inverter macro main mainboard micro microchip mosfet mount network nobody nopeople part power repair research resistor ring science service smt soldered spare supply surface switched tech technical technology toroid transformer transistor white winding wire yellow