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Electromagnetism
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In physics, electromagnetism is an interaction that occurs between particles with electric charge via electromagnetic fields. The electromagnetic force is one of the four fundamental forces of nature.
Electromagnetic interactions are responsible for the glowing filaments in this plasma globe.
Electromagnetic interactions are responsible for the glowing filaments in this plasma globe.
Foam peanuts clinging to a cat's fur due to static electricity. The cat's fur becomes charged due to the triboelectric effect. The electric field of t
Foam peanuts clinging to a cat's fur due to static electricity. The cat's fur becomes charged due to the triboelectric effect. The electric field of the charged fur causes polarization of the molecules of the foam due to electrostatic induction, resulting in a slight attraction of the light plastic pieces to the fur. This effect is also the cause of static cling in clothes.
Cover of A Treatise on Electricity and Magnetism
Cover of A Treatise on Electricity and Magnetism
Magnetism
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Magnetism is the class of physical attributes that occur through a magnetic field, which allows objects to attract or repel each other. Because both electric currents and magnetic moments of elementar
The shape of a bar magnet's magnetic field is revealed by the orientation of iron filings sprinkled on the table around it.
The shape of a bar magnet's magnetic field is revealed by the orientation of iron filings sprinkled on the table around it.
An illustration from Gilbert's 1600 De Magnete showing one of the earliest methods of making a magnet. A blacksmith holds a piece of red-hot iron in a
An illustration from Gilbert's 1600 De Magnete showing one of the earliest methods of making a magnet. A blacksmith holds a piece of red-hot iron in a north–south direction and hammers it as it cools. The magnetic field of the Earth aligns the domains, leaving the iron a weak magnet.
Drawing of a medical treatment using magnetic brushes. Charles Jacque 1843, France.
Drawing of a medical treatment using magnetic brushes. Charles Jacque 1843, France.
A live frog levitates inside a 32 mm diameter vertical bore of a Bitter solenoid in a very strong magnetic field—about 16 teslas
A live frog levitates inside a 32 mm diameter vertical bore of a Bitter solenoid in a very strong magnetic field—about 16 teslas