OERSTED'S LAW APPARATUS (0296) To show the effect of electric current on a magnet. Comprises a cobalt steel magnetic needle, about 75mm long, with agate bearing supported on pivot mounted on insulated pillar on base and surrounded by a rectangular frame of non-magnetic metal strip. Frame fitted with terminals for electrical connections. Passing the current through non magnetic frame causes magnetic needle to deflect as per Oersted's Law Qty :