Plastic switch for experiments.
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An annular magnet with face poles. Internal dia 12.5 mm, External dia 30 mm, thickness 6.5 mm
Size: 50 x 10 x 5 mm
Barlow Wheel for demonstrating the conversion of electric energy into mechanical energy. Star shaped copper disc 9cm dia. rotatable vertically on pair of adjustable centres and dipping
Ceramic magnets for good magnetic strength. Half red half blue, spray painted. 50 x 10 x 5 mm.
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