Which of the following statements about magnetic lines of force is not correct?
-
A.
a magnnetic line of force is an imaginary line which the north pole of a magnet would describe if it is free to moves -
B.
magnetic lines of force do not cross one another -
C.
magnetic lines of force are closely packed together at neutral point -
D.
the presence of magnetic lines of force in a region indicates the presence of a magnetic field