Place the iron strip on a table. Place one pole of a bar magnet near one end of the iron strip. Move the bar magnet along the length of the iron strip starting from one end to the other end as shown in the following figure. Then, lift the magnet and bring the pole to the starting point and move in the same direction as before. On repeating this process for at least 30-40 times, the iron strip will become a bar magnet with two poles.
