High-Current Standard Resistance Coils Subcategory_Scoops and Spatulas Four-socket E10 lamp holder pre-wired

Four-socket E10 lamp holder pre-wired in series on a hard-plastic base with two 4mm banana terminals

Nylon ball-bearing pulley with a bench-clamp fitting for edge-mounting on a worktable

Designed to make electric field lines visible

Long 1000mm black insulated lead with crocodile clips at both ends

8mm rod attachment and a centered 50mm aperture together hold a lens square against an optical-bench rail for repeatable refraction

High-Current Standard Resistance Coils Subcategory_Scoops and Spatulas Four-socket E10 lamp holder pre-wiredHeavy current 1. 5 ohm reference coil non inductively wound from constantan on a 43mm ABS supported bobbin with three 4mm sockets, rated to 8A for series resistor or potentiometer use.