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  1. Magnetism - Magnetic Fields, Forces, Materials | Britannica

    Dec 17, 2025 · All matter exhibits magnetic properties when placed in an external magnetic field. Even substances like copper and aluminum that are not normally thought of as having …

  2. Magnetism | Definition, Examples, Physics, & Facts | Britannica

    Dec 17, 2025 · Magnetism, phenomenon associated with magnetic fields, which arise from the motion of electric charges. It can be an electric current in a conductor or charged particles …

  3. Magnetism - Magnetic Fields, Forces, & Effects | Britannica

    Dec 17, 2025 · All matter exhibits magnetic properties when placed in an external magnetic field. Even substances like copper and aluminum that are not normally thought of as having …

  4. How Do Magnets Work? | Physics, Attract, & Repel | Britannica

    The fundamental principle behind magnetism is the magnetic field, which arises from the motion of electric charges. This field exerts forces on other magnetic objects and moving charges, …

  5. Magnetism - Magnetic Fields, Forces, & Materials | Britannica

    Dec 17, 2025 · An interesting result of the Lorentz force is the motion of a charged particle in a uniform magnetic field. If v is perpendicular to B (i.e., with the angle ϕ between v and B of 90°), …

  6. Electromagnetism | Definition, Equations, & Facts | Britannica

    Dec 26, 2025 · Electromagnetism, science of charge and of the forces and fields associated with charge. Electricity and magnetism are two aspects of electromagnetism. Electric and magnetic …

  7. Magnetism - Atomic Dipoles, Induction, Permanent | Britannica

    Nov 9, 2025 · Magnetism - Atomic Dipoles, Induction, Permanent: Whether a substance is paramagnetic or diamagnetic is determined primarily by the presence or absence of free …

  8. Magnetic Fields, Forces, Interactions - Britannica

    Dec 26, 2025 · Electromagnetism - Magnetic Fields, Forces, Interactions: The magnetic force influences only those charges that are already in motion. It is transmitted by the magnetic field. …

  9. Physics - Electricity, Magnetism, Study | Britannica

    Dec 28, 2025 · Particles with electric charge interact by an electric force, while charged particles in motion produce and respond to magnetic forces as well. Many subatomic particles, …

  10. magnetism summary | Britannica

    Magnet, any material capable of attracting iron and producing a magnetic field outside itself. By the end of the 19th century all the known elements and many compounds had been tested for …