One-Meter Two-Wire Potentiometer on Metal Base Lab Equipment and Supplies_Lab Supplies and 4-pole armature configurations on

and 4-pole armature configurations on the same motor frame by swapping interchangeable enameled-copper armatures past a permanent bar magnet on a disc commutator

and nucleus out of the cell body for hands-on organelle identification in cell biology teaching

the wider face brightening divergence demos while still producing reduced upright virtual images

Pairs a 90 by 45mm semicircular face with 15mm thickness on a glass prism block

One-Meter Two-Wire Potentiometer on Metal Base Lab Equipment and Supplies_Lab Supplies and 4-pole armature configurations onUsed to compare EMFs and measure internal resistance by the null deflection method, this two wire potentiometer mounts on a metal base for stability during extended laboratory measurements.