Visual demonstration of the electromagnetic field, compasses placed around a wire coil in the center of the circuit board shows an immediate and drastic change in direction when the board is turned on. Without battery, with instruction manual.
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Electromagnetic Circuit Board
Visual demonstration of the electromagnetic field, compasses placed around a wire coil in the center of the circuit board shows an immediate and drastic change in direction when the board is turned on. Without battery, with instruction manual.
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