Choose the incorrect statement from the following regarding magnetic lines of field:

Options

A. The direction of magnetic field at a point is taken to be the direction in which the north pole of a magnetic compass needle points.
B. Magnetic field lines are closed curves
C. If magnetic field lines are parallel and equidistant, they represent zero field strength.
D. Relative strength of magnetic field is shown by the degree of closeness of the field lines.

Answer

C

Explanation

Magnetic field lines appear parallel when they are far from the magnet. But this does not mean that field strength is zero. No field line would be present where field strength becomes zero.