Which of the following is false about the magnetic field lines?

Both 1 and 3

The correct answer is Option 4: Both 1 and 3

Option 1: Intersect each other. Magnetic field lines can never intersect each other. If two magnetic field lines were to intersect, it would mean that the magnetic field at that point has two different directions at the same time, which is not possible. A magnetic field at any point can have only one definite direction. Therefore, the statement “Intersect each other” is false.

Option 2: Never intersect each other is correct because magnetic field lines always maintain separate paths and do not cross one another. This is one of the important properties of magnetic field lines.

Option 3: Denser away from the poles is also incorrect scientifically because magnetic field lines are actually denser near the poles, where the magnetic field is stronger. Away from the poles, the lines are more spread out. However, in such questions, the standard expected false statement is usually the one directly related to the basic property of field lines, i.e., “Intersect each other.”