Amp Up Your Skills with NEIEP Magnetism & Electromagnetism 355 Exam 2026 – Power Up Your Future!

Magnetic field lines represent the direction of the magnetic field and, for a static field around magnets, they never cross. If two lines crossed at a point, that would imply the field has two different directions at the same location, which isn’t possible. That’s why the statement about lines crossing is false.

These lines do form closed loops: they emerge from the magnet’s north pole, loop around outside, enter the south pole, and inside the magnet they travel from south back toward north, continuing the loop. Outside the magnet the direction is from north to south, inside it’s from south to north. The rubber-band analogy fits well because the lines can be bent or stretched but remain continuous and unbroken.

So the false idea is that lines can cross each other; in reality they never cross.