Single-Phase Rheostat, 200mm, Model C Physics_Light & Optics Twelve 50 x 25mm metal

Twelve 50 x 25mm metal strips - each stamped with a key letter for blind-test identification - cover the standard set of metals used in magnetic-property classification labs

111110 megohms across seven cascaded decades

and field strength

Jolly bulb is 60mm diameter and is directly connected to a bourdon gauge

Ten-centimeter brass cone on an ebonite insulator and metal base

Single-Phase Rheostat, 200mm, Model C Physics_Light & Optics Twelve 50 x 25mm metalThirty three ohm 2. 2A single phase rheostat with cover protected constantan winding on a 200x56mm tube and 4mm safety socket terminals, with plus or minus 10% resistance tolerance.