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Eureka Constantan Bare Wire, Model H Subcategory_Electrochemistry Permanent magnet stack inside an 8 Permanent magnet stack inside an 8 x 5 inch base recharges weakened bar and horseshoe magnets by realigning their domains no electrical power 5mm copper wire on a clear acrylic base support side by side comparison of how loop count multiplies the on axis magnetic field at fixed current
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