Ampere's Rule Apparatus, 1 Each

The United Scientific® Ampere's Rule Apparatus is a classroom device for studying the magnetic field around a current-carrying wire. A heavy brass wire with terminals sits on a clear plastic base, and the set comes with one 45 mm compass, six 16 mm compasses, and an activity guide. Physics teachers use it to demonstrate Ampere's rule and the circular field pattern around a straight conductor.