A powerful visual demonstration of the electromagnetic field. -- Compasses are placed around a wire coil in the center of the circuit board. Students note the direction the compasses are pointing. The board is turned on. -- The change in compass direction is immediate and dramatic! A wonderful investigation of basic magnetism and electron charge movement. Developed by Brent Butler. -- Includes: circuit board, 12 compasses, instructions. Battery required – not included.

$29.75

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CIRCUIT GREEN

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