Question

What are magnetic field lines ? How is the direction of a magnetic field at a point determined ? (b) Draw field lines around a bar magnet along its length on its two sides and mark the field directions. (c) List any two properties of magnetic field lines.

Answer 1

the imaginary lines which shows the influence of a magnet is called magnetic field line.
the magnetic field at a point can be determined by Maxwell thumb rule.
field lines never intersect each other.
field lines arises from North to south for external region.
hope it help u.

Answer 2

magnetic field lines are imaginary lines
a tangent help to find the direction of the magnetic field
2 property are...1....magnetic field lines are in closed continuous curves .2......the tangent at any point of the magnetic field lines give the direction of the magnetic field at that point .3....no two magnetic field lines can intersect each other .4......magnetic field lines are crowded in a region of a strong magnetic field on the other hand magnetic field lines are far from each other or diverges in a region of weak magnetic field