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Electromagnetic Induction Coil, Induction Coil Electromagnet Kit, Demonstration Teaching with Primary Secondary Cylindrical Iron Core Physics Transformer Studying for Laboratory Lenz's Law electronics3 mother or anyone who enjoysElectromagnetic Induction Coil, Induction Coil Electromagnet Kit, Demonstration Teaching with Primary Secondary Cylindrical Iron Core Physics Transformer Studying for Laboratory Lenz's Law Product Features Experiment Instrument and Physics Experiment Teaching: This physics teaching electromagnet kit is designed to demonstrate electromagnetic induction and verify Lenz's law for students, secondary coil for physics teaching is an ideal choice for