Resistive skin time

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The resistive skin time is a characteristic time of typical magnetohydrodynamic (MHD) phenomena.

[edit] Definition

The resistive skin time is defined as: $\tau_R=\frac{\mu_0 a^2}{\eta}$ where $η$ is the resistivity, $a$ is a typical radius of the device and $μ 0$ is the magnetic permeability.