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Diy resistor from lead pencil
Diy resistor from lead pencil Diy resistor from lead pencil ,This is a demonstration of variable resistance. The core of a lead pencil does n't ... -
Diy galvanometer |design your own galvanometer
diy galvanometer | Design your own galvanometer Diy galvanometer, design your own galvanometer. In this activity you made galvanometer.In this activity you will learn simple ...