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DW A4 FDPP Board – Ideal for showing the relationship between fraction
It can be used to detect and measure the Earth's magnetic field
Philip Harris Demonstration Dynamo Clearance Weight: 1kgThe Demonstration Dynamo includes 2 pole armature wound with enamelled copper wire, and a permanent magnetic field provided by a removable magnet. The construction of the model is completely open and all components are readily observable. This model is mounted on a 200 x 125mm baseplate, which also carries a hand drive pulley, 125 diameter, coupled to the smaller dynamo pulley by a rubber belt. Electrical output is via a pair of 4mm sockets, and a