Which of the following best explains why breaking a permanent magnet never produces an isolated north pole?
a) Breaks in the magnet sever the magnetic field lines; without closed lines the north pole's field dissipates, so no isolated pole remains.
b) According to Lenz’s law, the act of cutting induces an opposite magnetic field that forms a new south pole at the break, cancelling any monopole.
c) The aligned atomic magnetic dipoles simply continue up to the new surfaces, so each fragment re-establishes its own closed field lines and behaves as a complete dipole.
d) Creating an isolated north pole would increase magnetic flux, so to conserve flux a south pole must automatically appear at the break.