Simple Tangent Galvanometer Light & Optics_Reflection & Refraction glass blocks

glass blocks

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

Amoeba model demonstrates pseudopodia

and four lenses for focal-length investigations

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

Simple Tangent Galvanometer Light & Optics_Reflection & Refraction glass blocksUsed 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.