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Calculator of magnetic field of straight round conductor

$$ H(d) = \frac{I_{tot}·r^2}{2·π·d·R^2} $$ (A/m) Equations are valid inside
as well as outside of the wire
(with certain assumptions)
$$ B(d) = \frac{μ_r·μ_0·I_{tot}·r^2}{2·π·d·R^2} $$ (T)
Total current in wire Itot (A) =
Radius of wire R (mm) =
Radius from centre d (mm) =
Relative permeability of wire μr (unitless) =
Relative permeability of surrounding medium μr (unitless) =    
H = (A/m)     B =       

Assumptions: current distribution is uniform, permeability is uniform and isotropic, high-frequency effects (radiation and relativistic) are negligibly small, where: $I_{tot}$ - total current (A) in the wire, $r$ - variable radius (m) within the wire from its centre such that $0 \leq r \leq R$ (and $r=d$ within the wire) , $d$ - any positive variable radius (m) from centre of wire, $R$ - outer radius (m) of the wire, $μ_r$ - relative permeability (unitless) of wire or the surrounding medium, and $μ_0$ = 4·π·10-7 H/m is the permeability of vacuum.

calculator/magnetic_field_of_straight_conductor.txt · Last modified: 2021/11/28 19:43 by stan_zurek

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