4-Socket Parallel MES E10 Lamp Holder Gifts Glass-flask leaf electroscope with a

Glass-flask leaf electroscope with a brass rod and aluminum leaf

Momentary-contact push-button switch on a base with two 4mm terminals

Sheet-metal D battery holder for two D-cells with spring-loaded terminals and 4 mm banana plug outputs

Steel U-section 170cm track on foot supports

this simple tangent galvanometer turns Oersted's effect into a quantitative ammeter calibrated against Earth's field

4-Socket Parallel MES E10 Lamp Holder Gifts Glass-flask leaf electroscope with aUsed to demonstrate parallel circuit current and brightness behavior, this four socket E10 lamp holder pre wires four bulbs across a single pair of 4mm banana terminals.