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What is the governing equation for field strength relative to distance?

April 26, 2017distance equation field relative strength

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What is the governing equation for field strength relative to distance?

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For a circular magnet with a radius of R and Length L, the field Bx at the centerline of the magnet a distance X from the surface can be calculated by the following formula (where Br is the Residual Induction of the material): There are additional formulae that can be used to calculate the field from a rectangular magnet and magnets in other configurations.

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Posted

For a circular magnet with a radius of R and Length L, the field at the centerline of the magnet a distance X from the surface can be calculated by the following formula (where Br is the Residual Induction of the material):