Final answer:
Magnetic field lines always form closed loops, which is a True statement. These loops indicate continuous, non-intersecting paths that field lines follow, exiting a magnet's north pole and entering its south pole.
Step-by-step explanation:
The claim that magnetic field lines always form closed loops is True. According to physics, magnetic field lines are continuous, meaning they form closed loops without a beginning or an end, and are directed from the north pole to the south pole of a magnet. When considering a bar magnet, magnetic field lines emerge from the north pole, loop around to the south pole, and then continue through the magnet back to the north pole. This creates the continuous, closed loops characteristic of magnetic fields.
Magnetic field lines also have several specific properties:
- The direction of the magnetic field is tangent to the field line at any given point, and a compass will align itself with this field.
- The strength of the magnetic field is proportional to the closeness, or density, of these lines.
- Field lines can never cross each other, as that would suggest two different directions for the magnetic field at a single point, which is physically impossible.