Tangent Galvanometer

Constructed of wood and copper clad, the Tangent Galvanometer consists of a horizontal platform supported about six inches above the table by two vertical square - frame legs. A long length of flexible copper wire, connected to a battery and flashlight bulb in series, can be looped around plastic hangers in the square frame, turn by turn. As turns are added, the deflection of a magnetic compass, located upon the platform and centered in the square coil, is observed to change. The deflections can be plotted on graph paper that is accurately fixed on the platform with respect to the compass. (Graph paper not included.)