NationMaster - Encyclopedia: Oersted

The oersted is old CGS unit of magnetic field strength (or magnetic induction). The magnetic field produced at the center of a plane circular coil of one turn and a radius of one centimetre, which carries a current of 5 amperes. CGS is an acronym for centimetre-gram-second. ... The word unit means any of several things: Unit of measurement or physical unit, a fundamental quantity of measurement in science or engineering. ... In physics, a magnetic field is an entity produced by moving electric charges (electric currents) that exerts a force on other moving charges. ... A coil is a series of loops. ... The metre, or meter (symbol: m) is the SI base unit of length. ... The ampere (symbol: A) is the SI base unit of electrical current equal to one coulomb per second. ...

H(oersteds)=0.4πN(turns)I(ampere)/l(centimeter) The ampere (symbol: A) is the SI base unit of electrical current equal to one coulomb per second. ... cm redirects here, alternate uses: cm (disambiguation) A centimetre (symbol cm; American spelling: centimeter) is an SI unit of length. ...

In SI units, 1 oersted = 1000/(4π) A/m = about 79.577 A/m The International System of Units (abbreviated SI from the French language name SystÃ¨me International dUnitÃ©s) is the modern form of the metric system. ... The ampere (symbol: A) is the SI base unit of electrical current equal to one coulomb per second. ... The metre (Commonwealth English) or meter (American English) (symbol: m) is the SI base unit of length. ...

In vacuum, magnetic field strength of 1 Oe is equvalent to magnetic flux density of 1 gauss Magnetic field density, otherwise known as magnetic flux density, is essentially what the layman knows as a magnetic field - akin to a gravitational or electric field. ... The gauss, abbreviated as G, is the cgs unit of magnetic flux density or magnetic induction (B), named after the German mathematician and physicist Carl Friedrich Gauss. ...

The unit is named after Hans Christian Ørsted who discovered electromagnetism in 1820. Hans Christian Ã˜rsted (August 14, 1777 â€“ March 9, 1851) was a Danish physicist and chemist, influenced by the thinking of Immanuel Kant. ...

Categories: CGS units | Units of magnetic induction | Physics stubs

Results from FactBites:

Scientist of the Month (769 words)
	Oersted was the child of a poor apothecary born on a Danish island in the Baltic in 1777.
	In early 1820 Oersted was booked to give a public lecture and while getting his demonstrations ready he had the idea that instead of looking for a magnetic field in the same direction as the current, perhaps the magnetic field was formed at right angles to the wire.
	Oersted did not accept Dalton's theory of atoms as hard particles and thought that at higher and higher pressures even liquids could be compressed into smaller and smaller volumes.

oersted (3122 words)
	Oersted's dissertation was heavily influenced by the thought of the German philosopher Immanuel Kant; in fact, in 1798 he served on an editorial staff of a journal largely given over to Kant.
	Oersted agreed with Kane and Schelling that this preliminary philosophical task was prerequisite, and he was concerned to "attempt to perfect the chemical theory of nature through the reduction of all chemical actions to the primary forces (Urkräfte) from which they originate.
	Shortly after Oersted's announcement the principle of electromagnetic induction was formulated by Michael Faraday in England, and this led to the development of the generator and ultimately the electric motor.

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