Relay Demonstration Unit, Allows The Investigation And Study Of How A Relay Functions, In A Clear And Practical Manner, The Circuit Powering The Coil Is Easily Seen To Be Completely Separate From The Circuit, Coil Input 4-6V Dc Bulb Input Max. 6V Ac / Dc
Magnetic Field Demonstration Plate - Large 250 X 250 mm, Comprising Of A Transparent Plate Having A Matrix Of Small Circular Chambers, Each Chamber Containing An Iron Rod And Functioning Independently With As A Plotting Compass