(a) Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole. (b)Whatdoes the degree ofclosenes of field lines represent ?

(a) Describe an activity to draw a magnetic field line outside a bar m

1.	(a) Describe an activity to draw a magnetic field line outside a bar magnet from one pole to another pole. (b)Whatdoes the degree ofclosenes of field lines represent ?
Answer» Solution :(a) Take a bar magnet and place it on a sheet of white paper fixed on a drawing sheet. Mark the boundary of magnet. Take a small compass and place it near the north pole of the magnet. Mark the position of TWO ends of compass NEEDLE. MOVE the needle to a new position so that its south pole occupies the position previously occupied by its north pole. In this way proceed step by step till we reach the south pole SN of magnet. Join the points marked on the paper by a smooth curve. This curve represents a magnetic FIELD line as shown in Fig. 13.14. (b) The degree of closeness of magnetic field lines signifies the strength of magnetic field.