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Uses electromagnetism to open or close circuits automatically.
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Stores energy in a magnetic field, used in motors and filters.
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Spins freely when voltage is applied.
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Moves in exact increments for robotics or printers.
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Combines red, green, and blue to make any color.
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Creates a temporary connection when pressed.
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Maintains position between ON and OFF.
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Activates when tipped or shaken.
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Uses infrared or ultrasonic waves to sense motion.