Hall effect, illustration

Hall effect, illustration

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Credit: KARL GAFF/SCIENCE PHOTO LIBRARY

Caption: Hall effect. Illustration of a germanium Hall effect wafer (upper left) and the resulting Hall effect in the germanium crystal (bottom right). An electrical current (pink line) is applied to the crystal and a potentiometer (ring at far right of Hall effect board) is used to balance the voltage to zero. The wafer is placed in a magnetic field perpendicular to the direction of the current. This causes a deflection in the current that leads to a negative charge building up on one side of the crystal, with a positive charge on the opposite side, and thus an electric potential is induced. This potential difference is called the Hall voltage.

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Keywords: artwork, blue background, crystal, diagram, electric current, electric field, electricity, electromagnetic, electromagnetism, hall effect, hall field, illustration, magnetism, no-one, nobody, physical, physics, solid material, transverse voltage, wafer

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