 # Choose the incorrect statement from the following regarding magnetic lines of the field (a) The direction of the 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) The relative strength of the magnetic field is shown by the degree of closeness of the field lines

(c) If magnetic field lines are parallel and equidistant, they represent zero-field strength

### Explanation

They have uniform magnetic field and doesn’t have zero magnetic field strength.In a uniform magnetic field, the field lines are parallel equidistant straight lines.

• The magnetic field lines do not cross over each other.
• The magnetic field lines are always in a closed-loop moving from the north pole to the south pole.
• The direction of the magnetic field is tangent to the field line.
• The strength of the field is proportional to the density of the lines. (0) (0)