ocr: Magnetic fields produced by electric currents An electric current flowing through a wire produces a magnetic field around the wire. This effect is called electromagnetism. It is used in very powertul magnets, such as the ones that move the flippers on the moon, and to operate electric motors. WIRE DIRECTION MAGNETIC OF CURRENT FIELD LINES Magnetic field around a single wire The magnetic tieldlines run 111 circles around the single wire above. This: is different from a bar magnet, in which the lines of the field tollow paths from the magnet's north pole around to its south pole. For normal curr ...
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