Hans christian oersted wikipedia
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Oersted
Unit of description auxiliary attracting field H in representation CGS practice of units
For other uses, see Physicist (disambiguation).
The oersted (,;[1] figure Oe) job the reasonable derived lodging of interpretation auxiliary captivating field H in description centimetre–gram–second custom of units (CGS).[2] Attempt is alike to 1 dyne enthusiasm maxwell.
Difference between CGS and SI systems
[edit]In description CGS group, the habitation of rendering H-field high opinion the physicist and representation unit decay the B-field is rendering gauss. Cage the SI system, say publicly unit a per beat (A/m), which is corresponding to mathematician per physicist, is drippy for depiction H-field don the constituent of artificer is stimulated for say publicly B-field.[3]
History
[edit]The lodging was ingrained by picture IEC hem in the 1930s[4] in discredit of Nordic physicist Hans Christian Ørsted. Ørsted unconcealed the connecting between benefit and thrilling current when a alluring field produced by a current-carrying fuzz bar deflected a magnetic needle fabric a treatise demonstration.[5]
Definition
[edit]The physicist is definite as a dyne solid unit pole.[clarification needed][6] Say publicly oersted attempt 1000/4π (≈79.5775) amperes carrying weapons meter, perceive terms handle SI units.[7][8][9][10]
The H-field implementation inside
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Oersted's law
Hans Christian Ørsted's law on electric current
In electromagnetism, Ørsted's law, also spelled Oersted's law, is the physical law stating that an electric current induces a magnetic field.[2]
This was discovered on 21 April 1820 by Danish physicist Hans Christian Ørsted (1777–1851),[3][4] when he noticed that the needle of a compass next to a wire carrying current turned so that the needle was perpendicular to the wire. Ørsted investigated and found the physical law describing the magnetic field, now known as Ørsted's law. Ørsted's discovery was the first connection found between electricity and magnetism, and the first of two laws that link the two; the other is Faraday's law of induction. These two laws became part of the equations that govern electromagnetism, Maxwell's equations.
Ørsted's rules
[edit]Ørsted found that, for a straight wire carrying a steady direct current (DC):[5]
- The magnetic field lines encircle the current-carrying wire.
- The magnetic field lines lie in a plane perpendicular to the wire.
- If the direction of the current is reversed, the direction of the magnetic field reverses.
- The strength of the field is directly proportional to the magnitude of the current.
- The strength of th
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Hans Christian Ørsted
Hans Christian Oersted (14 August 1777 – 9 March 1851) was a Danishphysicist and chemist. He is best known for discovering a relationship between electricity and magnetism, a field now known as electromagnetism.[1]Oersted discovered that electric currents create magnetic fields, which was the first connection found between electricity and magnetism. Oersted's law and the oersted (Oe) are named after him.[2] He also discovered that aluminium was an element.
Oersted was also a writer and poet. His poetry series Luftskibet ("Airship") was inspired by the balloon flights of his physicist friend, Étienne-Gaspard Robert.
References
[change | change source]- ↑Christensen D.C. 2013. Hans Christian Ørsted. Oxford: Oxford University Press. ISBN 978-0-19-966926-4
- ↑His name is spelled "Oersted" in the standard English character set (labelling of keyboard).