Tangent Galvanometer, 1 Each

The Tangent Galvanometer by United Scientific demonstrates how a current loop generates a magnetic field. It has two insulated-wire coils of 5 and 10 turns on a 6" diameter plastic ring, with 3 binding posts for 5, 10, or 15 turns, plus an included compass and activity guide. Physics teachers use it to study field strength, turns, and the tangent law.