Answer is (c) If magnetic field lines are parallel and equidistant, they represent zero-field strength
Explanation: Due to the fact that parallel lines of magnetism represent a homogenous magnetic field, the third option (c) is wrong.
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
(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
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
(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