Skin Depth
delta = sqrt(2·rho_r/(2·pi·f·mu_m))
What it says
How far an alternating current penetrates a conductor before falling to 1/e — why high-frequency wires are hollow.
Symbols
| Symbol | Quantity | Dimension |
|---|---|---|
delta | Skin depth (m) | L |
rho_r | Resistivity (Ω·m) | M L^3 T^-3 I^-2 |
f | Frequency (Hz) | T^-1 |
mu_m | Magnetic permeability (H/m) | M L T^-2 I^-2 |
Work it out
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Fill in all but one: rho_r, f, mu_m, delta are all empty.
Filed under Electromagnetism · derive through it in the explorer