Solenoid magnetic field energy
$$W = \frac{\mu\cdot \mu0\cdot H^{2}\cdot S\cdot l}{2}$$
W - magnetic field energy
μ - relative magnetic permeability
μ0 - magnetic constant
H - magnetic field intensity (strength)
S - cross-sectional area
l - length of solenoid
μ - relative magnetic permeability
μ0 - magnetic constant
H - magnetic field intensity (strength)
S - cross-sectional area
l - length of solenoid
Find
It is known that:
= 