DVD drive motor, SEM

DVD drive motor, SEM

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Caption: DVD drive motor. Coloured scanning electron micrograph (SEM) of the electric motor from a computer DVD disk drive. The turntable has been removed to show the interior. The central hole contains the spindle on which the turntable turns. Around the hole are 6 small electromagnets, composed of copper wire (orange) wound around metal bars. These electromagnets are fed with current, which generates a magnetic field. This interacts with permanent magnets on the turntable (not seen), causing it to spin at a constant speed. Magnification: x10 when printed 10 centimetres wide.

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Keywords: coloured, computer drive, copper, current, digital versatile disc, digital video disc, dvd, electric, electrical, electromagnet, electromagnetic, electromagnets, electronics, engineering, equipment, false-coloured, hardware, magnetic field, mechanics, motor, one, scanning electron micrograph, scanning electron microscope, sem, single, spin, spindle, technological, technology, turntable, wire, wires, wrapped

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