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Calculator of H at the centre of a Helmholtz coil

This section is an interactive calculator.
Magnetic field strength H at the centre of a Helmholtz coil
$$ H_{centre}(t) = \frac{N_{each}·I (t)· 8 } {r·\sqrt{125}} \approx 0.71554·\frac{N_{each}·I}{r} $$ (A/m)
where: $I(t)$ - current (A) at time $t$ (s), $N_{each}$ - number of turns (unitless) of each half-coil, $r$ - radius (m)
Current I =      Radius r =

Choose option:      Number of turns N = (unitless)

H =        B0) =

Notes: This equation is valid only for infinitely “thin” coils. The instantaneous values of H are directly proportional to the instantaneous values of I. The value of B(μ0) is for vacuum.
calculator/helmholtz_coil.txt · Last modified: 2022/12/10 20:13 by stan_zurek

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