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Primary & Secondary Coil

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#1440 Primary & Secondary Coil. Used to study electromagnetic induction & transformer principles.  The outer coil is 4 1/2"" tall and 2 3/4"" in diameter.  The inner coil is 3 3/4"" tall and 1 1/4"" in diameter.  The removable steel core with handle is 1/2"" in diameter and 5 1/2"" tall.  All coils are wrapped with 20 gauge magnet wire with insulated binding posts as connectors.