Which of the following statement(s) is/are incorrect?
Options:
(a) The magnetic field lines of a magnet(ora solenoid)form continuous closed loops. This is unlike the electric dipole, where these field lines begin from a positive charge and end on the negative charge or escape to infinity.
(b) The tangent to the field line at a given point represents the direction of the net magnetic field B at that point.
(c) The larger the number of field lines crossing per unit area, the stronger the magnitude of the magnetic field B.
(d) We can isolate the north or south pole of a magnet.