magnetic energy hard

Question

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 $u_B = \frac{B^2}{2\mu}$.

Rank Guru

magnetic energy hard

Select the correct option: