Iron Filings for indicating lines of magnetic force, pack of 500 gms.
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Made of steel, half red & half blue ( for N & S ) spray painted, with keepers.
Size: 50 x 10 x 5 mm
Demonstration Transformer – One main coil and 2 interchangeable secondary coils, 6 and 12 volt at 2 amp.
Plastic switch for experiments.
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