Abstract: A SIP (Symmetrical-in-Parallel) induction coil is made of winding two conductive wires symmetrically around a magnetic core and connecting them in parallel (refer to four figures in four pages). Such SIP induction coils can be applied to construct electromagnetic devices which have unique outstanding features of reduced magnetization current, reduced cupper loss, higher power efficiency, lower temperature-rise and reduced size (volume) of the electromagnetic devices.