Question

1.what are the magneic field lines? how the directions of a magnetic field at a point determined

2.draw two field lines around a bar magnet along it's length on it's two sides and Mark the field directions or them by arrow marks

Answer 1

the influence of the magnet I.e.., the magnetic field by a magnet is exerted in certain patterns of lines of arrangement . These lines are magnetic field lines.

direction is determined by using compass.