Simple Tangent Galvanometer Light & Optics_Reflection & Refraction Pole gap on this Alnico

Pole gap on this Alnico U-shape concentrates the field strongly enough to drive a Lorentz-force motor demonstration or to anchor a swinging-pendulum eddy-current setup

sized for finer-gauge resistance demonstrations and small-scale heating elements where the heavier gauges would over-deliver current

Virtually unbreakable ABS-plastic dynamics cart pair with two-level spring punches

and density concepts without needing an electrical power source

Simple Tangent Galvanometer Light & Optics_Reflection & Refraction Pole gap on this AlnicoUsed to measure current by reading compass needle deflection inside a coil, this simple tangent galvanometer turns Oersted's effect into a quantitative ammeter calibrated against Earth's field.