High-Current Standard Resistance Coils Subcategory_Scoops and Spatulas Spare charged porous pot for

Spare charged porous pot for the Leclanche cell

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

Designed to make electric field lines visible

Decade capacitance box stepping from 10pF to 100pF in 10pF increments at plus-or-minus 5% on a 63V rating

leaving inertia to drop the ball straight into the waiting receptacle below

High-Current Standard Resistance Coils Subcategory_Scoops and Spatulas Spare charged porous pot forHeavy 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.