Resistance Substitution Board, 33Ω - 10MΩ Subcategory_Reflection and Refraction Eight-inch external probe on a

Eight-inch external probe on a 36-inch cord on this handheld digital thermometer

demonstrating mechanical-to-electrical energy conversion as the crank lights the bulb

the half-size circulatory model traces arterial and venous pathways from heart to peripheral capillaries

and 6V-powered ignition light staging each step

fanning apart visibly when a charged rod approaches to demonstrate electrostatic repulsion and induction

Resistance Substitution Board, 33Ω - 10MΩ Subcategory_Reflection and Refraction Eight-inch external probe on aRotary knob resistance substitution board offering twelve discrete values from 33 ohms to 10M ohms with 4mm lead connections, sized to drop different loads into a circuit without rewiring.