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Oersted (abbreviated as Oe)

The unit of magnetizing force (magnetic field strength) in the CGS Electromagnetism system. One Oersted equals a mmf of 1 Magnetomotive force per centimeter of flux path. One oersted equals 1000/4π, or 79.58 ampere-turns per meterFink,Donald (1969). Standard Handbook For Electrical Engineers. McGraw-Hill. ISBN 0-07-020973-1.

From the Standard Handbook of Electrical Engineers; "It is that magnetic vector quantity at a point in a magnetic field which measures the ability of electric currents or magnetized bodies to produce magnetic induction at the given point."

H(\mbox{oersteds})=\frac{1.257NI} {l}

• One oersted (1 Oe) equals a magnetomotive force of one gilbert per centimeter of flux path.
• 1.257 is the conversion factor from 4π/10 if I is expressed in amperes, and l is expressed in centimeters.
• Ampere-turns = N x I
• Magnetomotive force (mmf) = 1.257 N I, so H = mmf divided by magnetic path length.
• In SI units, 1 gilbert = 10/ 4π ampere-turns = about 0.7958 A-turns.
• In vacuum, magnetic field strength of 1 Oe is equivalent to magnetic flux density of 1 Gauss (unit).
• The unit was established by the International Electrotechnical Commission in 1930 in honour of Hans Christian Ørsted, who discovered electromagnetism in 1820.

References



Oersted (abbreviated as Oe)

The unit of magnetizing force (magnetic field strength) in the CGS Electromagnetism system. One Oersted equals a mmf of 1 Magnetomotive force per centimeter of flux path. One oersted equals 1000/4π, or 79.58 ampere-turns per meterFink,Donald (1969). Standard Handbook For Electrical Engineers. McGraw-Hill. ISBN 0-07-020973-1.

From the Standard Handbook of Electrical Engineers; "It is that magnetic vector quantity at a point in a magnetic field which measures the ability of electric currents or magnetized bodies to produce magnetic induction at the given point."

H(\mbox{oersteds})=\frac{1.257NI} {l}

• One oersted (1 Oe) equals a magnetomotive force of one gilbert per centimeter of flux path.
• 1.257 is the conversion factor from 4π/10 if I is expressed in amperes, and l is expressed in centimeters.
• Ampere-turns = N x I
• Magnetomotive force (mmf) = 1.257 N I, so H = mmf divided by magnetic path length.
• In SI units, 1 gilbert = 10/ 4π ampere-turns = about 0.7958 A-turns.
• In vacuum, magnetic field strength of 1 Oe is equivalent to magnetic flux density of 1 Gauss (unit).
• The unit was established by the International Electrotechnical Commission in 1930 in honour of Hans Christian Ørsted, who discovered electromagnetism in 1820.

References

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