User Tools

Site Tools


calculator:helmholtz_coil

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

Disclaimer: This website is provided only for educational purposes. In no event the providers can be held liable to any party for direct, indirect, special, incidental, or consequential damages arising out of the use of this information.
Privacy and cookie policy (GDPR, etc.)