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Magnets marketed for pain relief usually claim strengths of 300 to 5,000 Gâmany times stronger than the Earthâs magnetic field (about 0.5 G) but much weaker than the magnets used for MRI machines (approximately 15,000 G or higher).
An object that attracts iron and some other materials. Magnets are said to generate a magnetic field around themselves. Every magnet has two poles, called the north and south poles. Magnetic poles exert forces on each other in such a way that like poles repel and unlike poles attract each other. A compass is a small magnet that is affected by the magnetic field of the Earth in such a way that it points to a magnetic pole of the Earth.