Demonstration Compass Science at Home An 18mm pole gap on

An 18mm pole gap on this 37 x 13 x 10mm Alnico U-shape concentrates field strongly enough to bend filings into clear field lines

with both 4mm stackable sockets and screw terminals so leads wire in without an adapter to either bench standard

producing more sinusoidal oscillation than a standard helical spring for SHM studies

paired with 4mm sockets so iron-filing patterns can be mapped around a current-carrying conductor for Oersted's experiment

Demonstration Compass Science at Home An 18mm pole gap onFive inch demonstration compass with a 4 inch magnetic needle and a printed compass map, sized so the needle stays readable from the back of the room.