Magnetic Energy Hard

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Energy density in magnetic field B (vacuum) is:

RankGuru · Accepted Answer

Magnetic fields store energy. The **energy density** ($u_B$) is the energy stored per unit volume ($J/m^3$):
$u_B = \frac{B^2}{2\mu_0}$
- This is analogous to electric energy density $u_E = \frac{1}{2} \epsilon_0 E^2$.
- For a medium of permeability $\mu$, the formula is $u_B = \frac{B^2}{2\mu}$.

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Magnetic Energy Hard

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