Solution to problem 2
... as Σ B · dn = 0 (thanks to the Stokes’ theorem), which means that the net flux of the magnetic field through any closed surface
Σ is always zero; in other words,
H there are no!magnetic monopoles. The second one, ∇ × E + ∂t B = 0, is the Faraday’s law of
induction, in the integral form, ∂Σ E · dl = ...