Solenoid
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A solenoid is a type of electromagnet formed by a helical coil of wire whose length is substantially greater than its diameter, which generates a controlled magnetic field. The coil can produce a unif
Magnetic field lines and density created by a solenoid with surface current density
Examples of irregular solenoids (a) sparse solenoid, (b) varied-pitch solenoid, (c) non-cylindrical solenoid
André-Marie Ampère
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André-Marie Ampère was a French physicist and mathematician who was one of the founders of the science of classical electromagnetism, which he referred to as electrodynamics. He made also important co
Solenoid
…generates a controlled magnetic field. The coil can produce a uniform magnetic field in a volume of space when an electric current is passed through it. André-Marie Ampère coined the term solenoid in 1823, having conceived of the device in 1820. The French term originally created by Ampère is solénoïde, which is a French…
Engraving of Ampère by Ambroise Tardieu, 1825
Portrait of Ampère by an unknown artist
Essai sur la philosophie des sciences